CSO

28 May 2020

Held 2020 Season 6
Adopted SCAR OZ-A, SCAR OZ-B, SCAR OZ-C and SCAR OZ-D
Reorganized Season Pass
Added Zombie Quest feature
Added Paint Switching feature
Updated Golden Zombie event
Held SKULL Is Back event
- SKULL-1, SKULL-3, SKULL-4 and SKULL-5 are given for free as a part of Weapon of the Month
- All these weapons are sold directly in shop
- These weapons and SKULL-9 damage are doubled
- These weapons are available for Weapon Enhancement +4
Held 3 days Mileage Auction
Added Premium Moderator item to Mileage Shop
Fixed various bugs
Updated Battlefield Supply with Season Coins

11 May 2020

Sold Zombie Z Weapon Box Set
Resold Premium Class Decoder
Held Random Weapon Zombie Hero
- Added new weapons
- Added Dust CSO Land
Resold Private Erica and Drill Instructor Gerard

28 April 2020

Adopted Psychic Harmonium
Resold Premium Transcendence Decoder
Patched All Star+ mode
Added All Star and Gun Deathmatch to Studio (mode)
Released Dust CSO Land
Held Mileage Auction event
Ended 2020 Season 5
Fixed various Studio bugs

16 April 2020

Resold Lucky Transcendence Weapon Box and Lucky Transcendence Class Box
Held Zombie Hero Random Rule event
Held Studio Kingdom Map Contest
Fixed various Expedition bugs

2 April 2020

Recruited Private Erica and Drill Instructor Gerard
Added Old-Time Costume Box
Resold Premium Class Decoder
Rebalanced Behind and Envy Mask
Added Expedition system
Updated Store and Mileage Shop
Updated Battlefield Supply
Fixed various bugs including some in Zombie Scenario maps, Studio New Zombie Shelter and on some weapons

19 March 2020

Added Harvested Fruit
Released Italy (Joseon) and Researcher's Journal Abduction #Joseon
Added Studio Joseon Pack
Held Studio Kingdom Contest
Held Seed event
Resold Thunder Ghost Walker and Dual Sword Phantom Slayer
Rebalanced Lightning Fury

5 March 2020

Adopted Lightning Fury
Added Enhanced Weapon Box
Held Candy event
Resold Transcendence Decoder
Released Joseon Village
Replaced Green Dragon Blade with Starlight Rolling Shooter in Unique Decoder
Updated shop and Mileage Shop
Held Studio Kingdom Map Contest event
Held Bonus Disassembly event
Updated Battlefield Supply
Fixed various bugs relating Studio Zombie Shelter

20 February 2020

Adopted Starlight Rolling Shooter
Sold Unique Decoder in shop
Held Random Rule Zombie Hero event
Held Arithmetic event to get Jiang Shi

6 February 2020

Held 2020 Season 5 Event
Updated Zombie Z
Adjusted Daily Missions
Held Valentine event
Updated Battlefield Supply
Fixed an issue where Magnum Launcher's B mode explosion sound was overlaid

21 January 2020

Re-added SVD Custom, Quad-barreled shotgun, Dual Kriss Custom and M134 Vulcan
Re-added Dual Desert Eagle, Dual Nata Knives, Dual MP7A1, Poison Gun and AK-47 60R
Patched Studio Zombie Shelter
Removed Top Class Decoder from store
Held Stingray Kite and Mileage Auction events
- Added Barrett M95 White Tiger and Hunter Killer X-45
Resold Axion, Aetheris, Kal-El and Medea
Fixed Venom Guard model changing to Chaser Zombie in Studio Script mode

9 January 2020

Adopted Heaven Splitter and Scorching Auto-Shotgun
Resold Epic Decoder
Held Epic Fragment event
Held Golden Zombie event

2019

19 December 2019

Added Rare Decoder, Unique Decoder and Class Decoder
Recruited Cyborg and Queen
Warhammer Storm Giant and Dual Uzi can now undergo Premium Weapon Enhancement
Added M4A1 Shadow Knight, AK-47 Royal Knight and Warhammer Bloodlord
Added [Engineer] and [Dorimemi Solo] medals
Added Save Contest Trophy and 2020 Mileage Coupon
Patched Manhunt mode
Revamped Weapon Enhancement
Added Friend/Family Content
Updated Store and Mileage Shop
Resold Santa Light zombie and Santa Heavy zombie
Held Surprise Mileage Auction
Adjusted some weapon levels in Zombie Z
Fixed various bugs in Scenario T Studio
Removed Top 50 Decoder from store

28 November 2019

Resold Transcendent Chest and Lucky Transcendence Class Box
Sold Transcendent Costumes in Mileage Shop
Held Mileage Bingo (Grand Prize: Python Desperado)
Held Random Zombie Hero event

14 November 2019

Adopted Hellhound
Added new medals
Added Studio Scenario T
Readded and updated Transcendence Decoder
Added Golden Zombie in Zombie Scenario
Released Alcatraz-Z
Updated shop content

31 October 2019

Sold Weapon Paint Package
Held and updated Zombie Hero Random Rule event
Held Zombie Hero Random Rule kill event

17 October 2019

Held 2019 Season 4 Event
Added 7 Zombie Scenario & 3 Hide and Seek medals
Resold Transcendent Chest with Holy Sword Divine Order added
Held Studio Save Function Map Contest
Improved Partner mode and released Villa map
Updated Hide and Seek mode
Added Studio Shop System
Updated Buy Menu and Round End Scoreboard
Reorganized New/Return Player Supply
Updated Store items and Battlefield Supply
Held Mileage Auction
Fixed various bugs and issues

26 September 2019

Added Premium Top Class Decoder
Updated Top Class Decoder content
Recruited Pink Heart Shiho and Black Rose Miho
Added Kart Characters to All Star mode
Added [Santaizi] Heavy Zombie costume
Added Hide and Seek Competition Trophy
Held Bonus Disassembly event
Held Transcendent Chest giveaway event

5 September 2019

Adopted X-TRACKER
Added Zombie Z medals
Patched Partner mode
Held Kart X CSO Collaboration Event
Released Crazyracing Kartrider theme package for Studio (mode)
Held Random Rule Zombie Hero event
Part System (BETA) Fifth Addition
Adjusted zombie meta
Added Studio Save function
Improved Hide and Seek mode
Updated shop content
Improved secondary password
Reintroduced Votekick
Suspended All Star mode

22 August 2019

Added [Subway Station] and [Space Museum] to Hide and Seek
Updated Top 50 Decoder content
Held Random Zombie Hero event
Resold Dual Sword Hellfire

8 August 2019

Adopted Shining Heart Rod
Improved Original mode
Released Alcatraz
Added Studio Original/Basic
Held Season Pass Badge event
Updated Battlefield Supply
Fixed various bugs

25 July 2019

Patched Hide and Seek mode
Held Hide and Seek map building contest
Updated Store and Mileage Shop contents
Fixed Episode Carlito's abnormal missile damage bug

11 July 2019

Held 2019 Season 3 Event
Adopted Dread Nova
Held Mileage Auction and Epic Part events
Updated Battlefield Supply
Fixed Studio sky bug

27 June 2019

Resold Lucky Rare Weapon Box
Added Settlement Support Weapon Box and Part Weapon Selection Box
Added Zombie Z Studio Creator medal
Held [Random Rule] Zombie Hero event
Updated Encyclopedia and Battlefield Supply
Updated Store with new weapons
Launched CSO TV
Added [New Maps] section to the new Studio lobby
Held Bonus Disassembly and [Hacker Report] events
Reverted some Gun Deathmatch weapons
Fixed some epic character bugs

13 June 2019

Unleashed Yaksha
Recruited Kal-El and Medea
Added [Made in Heaven] medal
Added Holy Sword Divine Order paint
Sold Blade Runebreaker and its Weapon Enhancement part
Part System (BETA) Fourth Addition
Resold Lucky Transcendence Class Box
Released Falls
Added Encyclopedia
Reorganized Studio lobby
Rearranged some weapon level in Zombie Z
Changed some weapons in Gun Deathmatch
Increased 50 additional inventory slots

30 May 2019

Adopted Infinity Laser Fist
Resold Premium Top 50 Decoder
Held Transcendent Chest giveaway event
Held Studio map contest
Updated Battlefield Supply
Fixed Episode Victor spawn bug

23 May 2019

Added Daily Top 50 Decoder Pack
Released Storage
Refreshed Store and Mileage Shop with new items
Updated New Classic restriction weapon list
Fixed various bugs

9 May 2019

Adopted Hunter Killer X-45
Black Dragon Cannon can undergo Weapon Enhancement now
Held Mileage Auction and Top 50 restriction has been lifted
- Added M3 Black Dragon, Star Chaser SR and M32 MGL Venom to the list
Resold all weapon paints

25 April 2019

Held 2019 Season 2 Event
Resold Lucky Transcendence Weapon Box
Updated Zombie Meta
Updated weapon levels in Zombie Z
Held Studio Zombie Z Map Competition
Resold Journey to the West and Wizard of Oz in points
Resold PLA, Vigilante Corps, National Liberation Campaign, Asia Red Army, Thunder Squad and SAT in points
Resold BALROG-XI, THANATOS-7, CHARGER-7, TURBULENT-1
Resold Hunter Killer Series in shop
Added bot difficulty setting in Zombie Hero and Zombie Z
Held Bonus Disassembly event

18 April 2019

Released Town Hall
Held [TDM Killer Event] medal
Held Seed event

4 April 2019

Recruited Axion and Aetheris
Added [Overseer] medal
Resold Lucky Transcendence Class Box
Patched Revive Update Part 9: Team Deathmatch Revive
Patched HUD 3rd Improvement
Held Random Zombie Hero event
Held Mileage Auction
Patched Zombie Z minor update
Updated Battlefield Supply

21 March 2019

Held Hunter Killer Series giveaway event
- Play for 100 minutes in Zombie Z mode to get Tier 3 Part Compensation Box (2 units)
- Play for 300 minutes in Zombie Z mode to get Hunter Killer X-15 (permanent)
- Play for 500 minutes in Zombie Z mode to get Tier 4 Part Compensation Box (2 units)
- Play for 700 minutes in Zombie Z mode to get Hunter Killer X-90 (permanent)
- Play for 900 minutes in Zombie Z mode to get Tier 5 Part Compensation Box (2 units)
- Play for 1200 minutes in Zombie Z mode to get Hunter Killer X-12 (permanent)
- Play for 1500 minutes in Zombie Z mode to get Tier 6 Part Compensation Box (2 units)
Held Bingo event and readded Barrett M95 White Tiger as the main prize
Login to get Claymore Mine MDS (30 days), Arm Torch (30 days), M3 Black Dragon 30 days, and Red Dragon Cannon (30 days)

7 March 2019

Adopted Thunder Ghost Walker
Held Find the Zombies event
Added Lua Script sample map for Zombie mode
Updated Battlefield Supply

28 February 2019

M4A1 Dark Knight and AK-47 Paladin can undergo Weapon Enhancement now

21 February 2019

Adopted Hunter Killer X-7
Part System (BETA) Third Addition
Studio Lua 1st Expansion
Patched HUD 2nd Improvement
Patched Revive Update Part 8: User Level/Rank Revive
Renewed Zombie Scenario Stats and Compensation
Sold THANATOS-9, Broad Divine, M950 Attack and Air Burster in shop
Added Gunsmith Toolbox, Weapon Exchange Coupon and Challenge Box
Removed TURBULENT Series and CHARGER Series from shop
Updated Top 50 Decoder content

7 February 2019

Released Assault EX
Held Find the Zombie Treasure event

24 January 2019

Held 2019 Season 1 Event
Adopted Gungnir
Added Epic Part and Epic Box
Added Siege Box and Epic Decoder
Updated Mileage Duffel Bag to sell 10 at once
Added Mileage Box
Added Revive Update Part 7: Mission Restructure
Released Rendezvous
Added Zombie Z to Studio (mode)
Removed Experience Coupon and Experience Up
Held Mileage Auction
- Added Arm Torch and Claymore Mine MDS

10 January 2019

Added Dual Sword Hellfire to Top 50 Decoder
- Use 10x Top 50 Unlimited Decoder or 60x Top 50 Decoder to get it for free
Patched HUD 1st Improvement
Held Nickname Change event
Held Bonus Disassembly event
Held Random Zombie Hero event
Updated Battlefield Supply
Balanced and fixed Zombie bugs
Updated some weapons in Gun Deathmatch

2018

27 December 2018

Added Desert Eagle White Gold and Stone Venom Guard
Adopted Trinity Grenade
Patched Zombie Touchdown
Held Mileage Auction

13 December 2018

Recruited Rose Phoenix
Added [Phoenix Wing] costume
Added [Dark Knight], [Paladin], [Crimson Hunter], [Lycanthrope], [Phoenix] and [Secret Soldier] medals
Added 10th Anniversary Weapon Box and CSOGS Compensation Box
Added [CSOGS] Paint
Resold Santa Light Zombie and Heavy Zombie costumes
Patched Revive Update Part 6: HUD Revive
Added BOT Support for Zombie Hero and Zombie Z
Added Studio webpage
Updated Zombie Z with new mutations
Held Christmas events
Updated Battlefield Supply

29 November 2018

Held Zombie Hero Last Stand event
Released Cantera and Desktop
Held Bonus Disassembly event

15 November 2018

Added Transcendent Chest
Resold Lucky Transcendence Class Box
Held Token event
Added Lua script support to Studio (mode)
Added Lua Tutorial Map

1 November 2018

Added Barrett M95 White Tiger
Added Transcendent Life Weapon Box, Bingo Ticket and VIP Pass
Readded M3 Black Dragon and Dual Sword Phantom Slayer to Premium Top 50 Decoder for 2 weeks
- Use 150 Premium Top 50 Decoder or 25 Unlimited Premium Top 50 Decoder to obtain M3 Black Dragon for permanent
- Use 300 Premium Top 50 Decoder or 50 Unlimited Premium Top 50 Decoder to obtain Dual Sword Phantom Slayer for permanent
Updated Playroom
Renewed Mileage Bingo
Improved [Game Start] function
Updated Top 50 Decoder contents

18 October 2018

Added Lucky Halloween Weapon Box
Added Halloween theme pack to Studio
Added new Studio map: Researcher Journal #6: Halloween Sample Map
Resold Weapon Paints
Readded Hidden mode
Held Random Weapon Zombie Hero event
Adjusted some weapons and zombie levels in Zombie Z
Updated Battlefield Supply

4 October 2018

Added Hunter Killer X-12 to Top 50 Decoder
Added new Studio map: Research Journal #5: Bell Institute Epilogue
Held 3rd Studio Contest
Released Mileage Shop

28 September 2018

Fixed and buffed Holy Sword Divine Order
Added 1000 Mileage bidding event in Mileage Auction

20 September 2018

Added Holy Sword Divine Order to Premium Top 50 Decoder
Added Transcendent Fernando and Transcendent Blair to Top Class Decoder
Added Refined Holy Water Bomb and Dark Legacy Luger
Added Rice Cake Grenade
Added Part Tier 3, 4, 5 Compensation Box
Python Desperado can undergo Weapon Enhancement now
Held Mileage Auction
Updated Battlefield Supply

13 September 2018

Patched Revive Update Part 5: Zombie Z
Added new items in Part System
Added Gold Moon Cake
Zombie Hero Meta Change
Zombie Scenario Second Reboot
Part System (BETA) Second Addition
Added Ice World and Warehouse to Deathmatch
Add Zombie Class Display
Changed lobby background and background music
Python Desperado looted into Top 50 Decoder
Held Bonus Disassembly event

23 August 2018

Adopted Hunter Killer X-90
Added Mila and Lisa to Top Class Decoder
Added new official Studio map: [Bells Institute #03: Blast]
Top 50 Decoder content change: Added Star Chaser SR and removed THANATOS-7
Updated Battlefield Supply

9 August 2018

Patched Revive Update Part 4: Zombie Scenario Season 7
Released All-Out
Added Water Balloon Grenade
Added M4A1 Dark Knight +6 and AK-47 Paladin +6 Early Access Ticket
Added M4A1 Dark Knight and AK-47 Paladin Weapon Enhancement material
- Dark Knight and Paladin now can be disassembled to get their enhancement material, but the weapon can not be enhanced until 28 February 2019 Update. Players who purchased and used the Dark Knight and/or Paladin Early Access ticket will be given access to use the enhanced weapons right away.
Removed Bingo temporarily, to rework and reintroduce at a later date.
Added Weapon Favorite feature
Improved Report system
Brand Top 30 Decoder content change

26 July 2018

Patched Revive Update Part 3: Event Revive
Adopted Hunter Killer X-15
Papin can undergo Weapon Enhancement now
Added Part Weapon Only Special Box, Mileage Lottery and VVIP Pass Item
Added a new Studio map: Researcher's Journal #4: Yuri Rescue
Revived Gun Deathmatch
Announced the closure of Bingo on 9 August. Bingo will be renewed and reintroduced.
Fixed conflict between players and maps bug
Updated and held Mileage Auction

12 July 2018

Unleashed Rusty Wing
Added Lucky Transcendence Class Box
Added Summer Saver Package
Added Top 50 Decoder Crate
Patched Revive Update Part 2: Zombie Revive
Introduced Part System (BETA)
Patched Zombie Scenario Reboot
Changed M249 Phoenix performance
Held Transcendent Weapons giveaway event
Held Bonus Disassembly event

28 June 2018

Added M249 Phoenix to Premium Top 50 Decoder
Sold Premium Top 50 Decoder & Premium Top 50 Decoder Unlimited bundle
Added Zombie Escape to Studio (mode)
Added [Zombie Escape] Temple map to Studio mode
Held Zombie Escape Studio map creation contest
Patched Revive Update Part 1: Interface Revive
Held Character Free Time event
Held Random Weapon Zombie Hero event
Updated Battlefield Supply

14 June 2018

Added Milkor M32 MGL Venom to Top 50 Decoder
Open 15 Top 50 Unlimited or 90 Top 50 Decoders to obtain M32 MGL Venom for permanent
Added Student Light zombie to Top Class Decoder
Readded Chef Heavy zombie and Nurse Sting Finger to Top Class Decoder
Open 90 Top Class Decoders to obtain Student Light zombie for permanent
Added Rice Grenade

31 May 2018

Added Star Chaser AR to Top 50 Decoder
Added M3 Black Dragon to Lucky Transcendence Weapon Box
Added Studio Soccer Theme Pack
Removed Matchmaking and Mileage Decoder completely
Updated Battlefield Supply
Increased max FPS from 60 to 101
Battle Weapons can be extended now
Added Zombie Hero "Revive" Test mode

17 May 2018

Added Transcendent Michaela to Top Class Decoder
Readded Dorothy Dark Knight and Transcendent Yuri to Top Class Decoder
Held Find the Zombies event

3 May 2018

Red Dragon Cannon can undergo Weapon Enhancement now
Updated the contents of Top 50 Decoder and Battlefield Supply
Held Mileage Auction and added Bouncer and Stun Rifle
Added Transcendent Red Dragon Cannon Gold to Mileage Auction

19 April 2018

Added Dual Beretta Gunslinger to Premium Top 50 Decoder
Held Random Weapon Zombie Hero event
Added back Dual Sword Phantom Slayer into Premium Decoder for 2 weeks
Fixed Arm Torch bugs

5 April 2018

Added Space Theme for Studio (mode)
Added [Mummy] Stamper costume
Added Top 11 Weapon Box to Battlefield Supply

22 March 2018

Added Claymore Mine MDS to Top 50 Decoder
Added [Golem] Ganymede costume
Added M4A1 White Gold
Improved homepage
Changed Zombie Hero rules

8 March 2018

Added Arm Torch to Top 50 Decoder
Adopted TURBULENT-11
Resold Flora Paladin and Transcendent Choi Ji Yoon
Updated the contents of Top 50 Decoder and Brand Top 30 Decoder
Held arithmetic event

14 February 2018

Held Mileage Auction and added Pesticide Sprayer
Held Valentine and Stingray Kite event
Held Free Time event for AUG Guardian, Red Dragon Cannon, Python Desperado, Bunker Buster LTD, and Pesticide Sprayer
Added 5 new Zombie Scenario Medals

6 February 2018

Held Bonus Disassembly event

1 February 2018

Adopted Rock Breaker
Added Destroy mode in Studio (mode)
Added new Studio map: Research Journal #4 (Game Company)
Added new features for Studio mode
Held Mileage Lottery event

18 January 2018

Added Magnum Launcher
Held Lunar New Year and 10 Years Anniversary event
Held Random Weapon Zombie Hero event

4 January 2018

Held Crazy Zombie Hero and Hell Gate City of Damned (New)
Play these events to get Battle PJ MK3A1 and Battle PGM Hécate II
Held Free Time event for AUG Guardian, Red Dragon Cannon, Python Desperado and Bunker Buster LTD

2017

28 December 2017

Adopted TURBULENT-1
Released Oblivion
Readded AUG Guardian to Premium Top 50 Decoder for 3 weeks
Held Fortune bag event

14 December 2017

Added Elizabeth Crimson Hunter and Sonya Lycanthrope to Top Class Decoder
Unleashed Chaser Zombie and Blotter Zombie
Resold Santa Light zombie and Santa Heavy zombie
Updated Tutorial Mode Completion Prizes
Held Christmas event

30 November 2017

Adopted TURBULENT-3
Added Studio Xmas Pack
Resold Paints
Added Studio (mode) Country Map

16 November 2017

Added Star Chaser SR to Top 50 Decoder
Unleashed [Succubus] Light zombie costume
Adopted AK-47 White Gold
Added Dust EX and Italy EX to Bot Zombie Mod
Added New Ranking System

2 November 2017

Adopted Battle Negev
Released Skyscraper
Added Natasha (Casual) and Jennifer (Uniform) to Top Class Decoder

26 October 2017

Updated Find the Zombies event
Held Find the Zombies event
Added Transcendent Magnum Drill Gold to Find the Zombies Grand Prize

19 October 2017

Added Stun Rifle to Top 50 Decoder
Added [Metro City] to Studio (mode)
Updated Studio mode with new features
Held Studio Video Competition
Held Halloween event

12 October 2017

Added Chef Heavy zombie and Nurse Sting Finger to Top Class Decoder
Added Random Mileage Box
Held Mileage Auction

21 September 2017

Added Dual Sword Phantom Slayer to Premium Top 50 Decoder
Added Jay's Dagger
Experience Coupon can now be bought with game points
Added Mileage Duffel Bag
Bendita and Newcomen can now undergo Premium Weapon Enhancement
Readded Python Desperado to Premium Top 50 Decoder
Released Episode Carlito
Added new Medal: [Best Creator]

7 September 2017

Added Bouncer to Top 50 Decoder
Adopted Battle Python
Held Crazy Zombie Hero event

24 August 2017

Recruited Transcendent Yuri and Transcendent Choi Ji Yoon
Adopted CHARGER-5
Renewed Zombie Annihilation
Updated free weapons for Internet Cafe users
Added back removed modes

16 August 2017

Updated the content of Top 50 Decoder and Brand Top 30 Decoder
Updated the TOP 7 list of Mileage Auction

10 August 2017

Added Maple Story Theme Pack for Studio (mode)
Added Pesticide Sprayer to Top 50 Decoder
Added new official maps for Studio mode:
- Researcher Journal #2: Hospital Escape
- Researcher Journal #03: Play with Yuri (Maple Story story theme)

27 July 2017

Added Top Class Decoder
Ripper, Blood Dripper, Compound Bow, and Savery can undergo Premium Weapon Enhancement now
Renewed and held Weapon Auction
Added Red Dragon Cannon to Top 50 Decoder for 2 weeks
Updated Bingo

13 July 2017

Adopted TURBULENT-9
Resold CROW-1 and TURBULENT-5
Officially released Studio (mode)

29 June 2017

Adopted AUG Guardian
Resold Premium Top 50 Decoder
Gáe Bolg and Plasma Gun can undergo Weapon Enhancement now
Resold CROW-3 and CROW-11
Held Life Weapon Box event
Updated Zombie DNA
Added [Zombie Master] medal
Added [Live Streaming] function
Held Ice Breaking event
Removed Zombie Enhancement
Updated skill for Lilith and Metatronic

15 June 2017

Added Battle PP-19 Bizon
Sold Global Paint Design
Held Zombie Hero Division and Light Zombie Boss events

1 June 2017

Added Bunker Buster LTD to Top 50 Decoder
Resold Henry, Gunsmith, Ha Ly and Krieg
Added Playroom mode
Removed [Weapon Manufacturing] and [Material Combination] tabs from Craft section
Removed all Combat Blueprint, Durability Material and Perfect Pick Recipe
Compensated the lost items with Duration Extenders and a random weapon for 100 days (for Perfect Pick Recipe)
Fixed CHARGER-7's firing sound

11 May 2017

Adopted CHARGER-7
Patched Studio (mode)

20 April 2017

Resold CROW-5 and CROW-7
Added Python Desperado and Premium Top 50 Decoder
Thunderbolt and Green Dragon Blade can undergo Premium Weapon Enhancement now
Added Battle PJ MK3A1
Resold [Race Pattern], [SKULL Blood], [BALROG Poison] Paints
Held Life Weapon Box and Find the Zombies events
Added Matchmaking system
Held Crazy Zombie Hero and Zombie Shelter Hell Gate events

6 April 2017

23 March 2017

Adopted CROW-1
Added Frozen Terror to All Star
Adjusted some character abilities in All Star
Held Weapon Auction
Replaced all Cross signs to 'H' letter (Noticeably Criss)

2 March 2017

Released Episode Lucia
Adopted Brick Piece S1451
Resold Choi Ji Yoon (Limited Edition), Michaela (Limited Edition), Alice (Limited Edition) and Yuri (Limited Edition)
Removed Mileage Decoder

9 February 2017

Adopted TURBULENT-5
Held Valentine event
Patched All Star mode
Held Stingray Kite event

19 January 2017

Adopted Red Dragon Cannon, Special Duck Foot Gun and Sterling Bayonet
Added VIP system update
Held LNY, Stingray Kite and Light Zombie Boss events

2016

29 December 2016

Resold VULCANUS-1, VULCANUS-3, VULCANUS-5, VULCANUS-7 & CROW-9
Added Top 50 Unlimited Decoder, Top 50 Decoder and Brand Top 30 Decoder
Magnum Drill, Blade Runebreaker, SG552 Lycanthrope, Desert Eagle Crimson Hunter, Crossbow Advance, Volcano can undergo Weapon Enhancement now
Weapon disassemble reward is changed from random Durability Material, Combat Blueprint and Duration Extender to Mileage Point 500, and Duration Extender 100
Updated Bingo
Held Weapon Auction event

15 December 2016

Resold M134 Minigun Xmas, MG3 Xmas, Barrett M95 Xmas, MG36 Xmas, M1887 Xmas, Tomahawk Xmas, JANUS-7 Xmas
Unleashed Heavy zombie Xmas and Light zombie Xmas
Sold M950 Attack, Laser Minigun and Destroyer in shop
Resold Dual Infinity Final in shop
Added special paints for these weapons
Held Exciting Decoy and Teddy Terror Events

1 December 2016

Released Episode Victor
Added 3rd-person View Before Round Start function
Recruited Dorothy Dark Knight and Flora Paladin
Added Burning AUG to Bingo
Clear Episode Victor to get Victor character
Spend 100 Premium Decoders to get [Dark Knight Mask] or [Paladin Crown] Costumes
Resold Premium Decoder and Wizard of Oz
3 Mileage Decoders can be combined to get 1 Transcendence Decoder now

16 November 2016

Sold TURBULENT-7 in shop
Adopted Battle QBS-09
Recruited Ian and Yuwei
Added BALROG-IX WC and BALROG-XI WC
Resold Calico M950, Petrol Boomer, AWP-Z and Maverick series
Held Zombie Shelter City of Damned (New): Hellgate market event

3 November 2016

Adopted War Fan and TURBULENT-7
Resold Mileage Decoder Bundles
Greatly updated Battlefield Supply
Held Jiang Shi Giveaway Event
Rebalanced Storm Giant Warhammer and Blade Runebreaker
Added BOT Radio mute option

20 October 2016

Adopted CROW-3 and Battle FNP-45
Resold THANATOS-1, THANATOS-9 and THANATOS-11
Held Crazy Zombie Hero event

6 October 2016

Added Rail Buster to Mileage Decoder
Added Life Weapon Box
Resold Mileage Decoder Bundle
Resold THANATOS-3, THANATOS-5 and THANATOS-7

22 September 2016

Adopted Tornado and Flame Jackhammer
Added Battle Ultimax 100
Held Crossbow upgrade event
Held Zombie Evolution event

8 September 2016

25 August 2016

Adopted CROW-11
Added Compound Bow Planet Paint
Held Zombie Hero Division Event

11 August 2016

Resold Dual Infinity Final with Lace Pattern Paint
Resold JANUS-1, JANUS-5 & JANUS-9
Held VICTORY Event (MG3 Nation Flag)

28 July 2016

Released Episode Choi
Adopted CROW-9
Held Weapon Auction Event
Held Massive Upgrade Event

14 July 2016

Adopted Plasma Gun Aqua, Thunderbolt Green Leaf and Savery Violet
Standard Weapon Limit Option Update:
- Name Change (New Classic --> Standard)
- 8 Banned Weapons (Magnum Drill, M4A1 Dark Knight, AK-47 Paladin, Ripper, Black Dragon Cannon, Gae Bolg, Air Burster, Newcomen)
- Arms Limitation Display Button
Weapon Damage Boost Update
Events
- Battle Weapons
- Mileage Auction
- Permanent Weapon Decompose
- Hot-Time Mileage Giveaway
- Play-Time Mileage Giveaway
Etc:
- PP-19 Bizon sound fix
- Zombie DNA is now give an effect in Tournament server
- Deleted CSO Survey
- HOT & NEW Tab Change
- Decoder & Bingo Update
- SKULL-9 Bug Fix
- Door Bug Fix in Assault and Abyss2
- Oberon Bug Fix in Dead End

30 June 2016

Adopted SG552 Lycanthrope
Added Power Falcon and Broad Divine into Bingo
Resold Transcendence Decoder Bundles
Updated Zombie DNA
Changed Zombie Hero rules
Renewed Banshee and Psycho Zombie
Increased Hero's and Sidekick's weapon damage
Increased damage for AK-47, M4A1, AWP and XM1014 in Zombie modes and Zombie Scenario
Updated Battlefield Supply

23 June 2016

Resold Poison Paint, BALROG-I, BALROG-V, BALROG-VII and BALROG-IX
Held 30,000 Mileages Dream event
Updated Battlefield Supply

16 June 2016

Adopted PP-19 Bizon
Released Mirage
Held Claim Your Weapon to achieve the Bizon
Updated Battlefield Supply

9 June 2016

Held Claim Your Weapon to achieve the KH-2002
Held AK-47 Paladin/M4A1 Dark Knight/Magnum Drill Dream event
Updated Battlefield Supply

26 May 2016

Added Brick Piece T50 into Code Box
Resold Mileage Decoder Bundles
Held Zombie Hero Division event
Held Event Mileage Decoder, Mileage Coupon giveaway and Free Time events
Updated the animation for SKULL-7, Glock 18, MAC-10, P228 and MG3
Updated Battlefield Supply

12 May 2016

Adopted KH-2002
Resold Blood Paint, SKULL-7, SKULL-9 and SKULL-11
Held Claim Your Weapon event to achieve the KH-2002
Updated Battlefield Supply

3 May 2016

Modified Tutorial Mode:
- Basic operations reduced from 6 to 2
- Removed Zombie Scenario Tutorial
- Changed mission clear compensation
Changed some mode names:
- "Zombie Original" is changed to "Zombie Classic"
- "Bot Zombie" is changed to "Zombie"
Other changes:
- Changed Quick Entry button to green
- Tutorial pops out automatically
- Showed guide to activate/deactivate Excellent Genes
- Modified setting to not allow Friendly Fire in all Zombie modes
- Added bots with M249 into Bot Zombie
Held National Children Day event
Updated Battlefield Supply

21 April 2016

Adopted Desert Eagle Crimson Hunter and VULCANUS-3
Resold BALROG-XI and Transcendence Decoder
Held Crazy Zombie Scenario event
Held Mileage Decoder giveaway event
Updated Battlefield Supply

7 April 2016

Adopted Ultimax 100
Resold BALROG-III and BALROG-XI
Introduced Poison Paint (exclusive for BALROG-III and BALROG-XI)
Held Claim Your Weapon event to achieve the Ultimax 100
Held Dual Infinity Custom/Final Upgrade Events
Held Transcendence Decoder giveaway event
Updated Battlefield Supply

24 March 2016

Adopted Batista
Resold SKULL-9, Calico M950, Eruptor, Tactical Knife, M60E4 Maverick, Crowbar Maverick, Petrol Boomer, AWP-Z and Journey to the West series
Held Time Weight and Crazy Zombie Hero events
Updated Battlefield Supply

10 March 2016

Adopted VULCANUS-1 and PP-2000
Resold SKULL-1, SKULL-3 and SKULL-5
Introduced Blood Paint (exclusive for SKULL-1, SKULL-3 and SKULL-5)
Held Zombie Scenario Chronicle event (from season 3 to 5) to achieve [Asura] Medal
Held Claim Your Weapon event to achieve the PP-2000
Updated Battlefield Supply

25 February 2016

Released Farero
Resold SKULL-4
Held Treasure Hunt event
Updated Battlefield Supply

18 February 2016

Adopted CROW-5
Held Fighting event
Updated Battlefield Supply

28 January 2016

Updated Zombie Scenario: added more difficulty levels and renewed reward system
Released Last Ride
Held Letter Collecting Event for Magnum Drill and Chain Grenade
Added M950 Attack and Destroyer to Bingo
Introduced Monkey Box
Resold Mileage Decoder Bundles, THANATOS-9 and BALROG-XI (Confirmed Set)
Held Stingray Kite and Valentine events
Updated Battlefield Supply

14 January 2016

Updated New Zombie Shelter:
- Released Shelter Tier 4 and new items
- Added new human skills
Released Rhyzome
Adopted HK121
Held HK121 Custom Upgrade Event

2015

31 December 2015

Adopted CROW-7
Held New Year, Ice Breaking and Zombie Balloon events
Updated Battlefield Supply

17 December 2015

Patched Z-Noid
Recruited Metatronic and Lilith
Adopted JANUS-7 Christmas
Introduced Transcendence Decoder
Added Warhammer Storm to Transcendence Decoder
Held Christmas events
Introduced Month Weapon system

3 December 2015

Adopted VULCANUS-11, Colt Python, SKULL-2, Heavy Zombie Knife and AWP Elf Ranger
Recruited Rebecca and Ace
Introduced [Pharaoh] Costumes and Random Item Box
Resold Double-barreled shotgun for Upgrade Event
Added Santorini and Snow Base into Zombie modes
Held Claim Your Weapon event to achieve the Python
Updated Weapon Experience and Battlefield Supply

19 November 2015

Adopted THANATOS-3
Updated Zombie Enhancement system
Released Choi Ji Yoon and Galaxy Paints
Added 9 new Medals and 2 new Achievements
Held Pick Up and Melee Weapons License events
Updated Weapon Experience and Battlefield Supply

5 November 2015

Adopted Falcon and Lightning HMG-1
Released Snow Base
Held Claim Your Weapon event to achieve the Falcon
Updated Bingo:
- Allowed players to change the special reward (after clearing Bingo) twice per month for free
- Added Special Reset button
Log into the game during event period to receive CSOWC 2015 Spray (permanent) and play any Original game to get CSOWC Tattoo (30 days)
Updated Weapon Experience and Battlefield Supply

22 October 2015

Adopted VULCANUS-9
Updated Zombie Giant: add RAH-66 Comanche for human team and Angra for zombie team
Added 7 new Medals
Held Halloween event
Updated Weapon Experience and Battlefield Supply

8 October 2015

Added Truth and Fastline to Zombie mode
Adopted IMI Negev NG-7 and THANATOS-1
Held Claim Your Weapon event to achieve the NG-7
Held Bingo Commemorative Event:
- Added Ripper to Mileage Decoder
- Added Ripper to the list of Bingo Grand Prize
- 2× probability to Laser Minigun and Dual Uzi in Bingo
Resold Katana, Dual Infinity and Double Barrel for Upgrade Event
Held Fortune Cookie event

17 September 2015

Released Collapse
Adopted M4A1 Dark Knight and AK-47 Paladin
Added Laser Minigun and Dual Uzi into Bingo
Added Transcendence Piece for 2 weeks into Mileage Decoder
Resold Mileage Decoder Bundles
Held Mid-Autumn Festival
Updated Weapon Experience and Battlefield Supply

3 September 2015

Adopted QBS-09
Released Eagle Paint
Introduced S-Box, J-Box and M-Box
Resold Calico M950, UTS-15, M14 EBR, ARX-160 and Barrett M95
Held Bells event
Held Claim Your Weapon event to achieve the QBS-09
Updated Weapon Experience and Battlefield Supply

20 August 2015

Released Bunny Yard and Parking
Adopted VULCANUS-5
Resold Franchi SPAS-12 for Upgrade Event
Held Mosquitoes, Crazy Gun Deathmatch and Bot Zombie Premium Supply Box events
Updated Weapon Experience and Battlefield Supply

6 August 2015

Extended Level Limit from 72 to 250
Added, changed and deleted some Daily Missions
Added Brick Piece M777 and [Superhero] costumes to Code Box
Introduced Level Up Coupon
Resold Mileage Decoder Bundle
Modified Zombie Tag
Held Lucky Coin, Premium Decoder and Jackpot Point Box events
Updated Weapon Experience and Battlefield Supply
Fixed some bugs in Metro

23 July 2015

Patched Grievance Update
Patched Zombie Tag mode
Added Greesia and Out City to Zombie Tag mode
Adopted Air Burster
Recruited Jin Se-yeon
Held Find the Zombies, Premium Decoder and Jackpot Point Box events
Updated Weapon Experience and Battlefield Supply

9 July 2015

Released Another Truth
Adopted VULCANUS-7
Log in, play 30 & 60 minutes to get Premium Decoders
Collect 100 kill points to get Jackpot Point Box
Log in to receive Discount Coupons
Fixed wrong grenade HUD icon for THANATOS-5
Fixed Cloak bug in New Zombie Shelter
Updated Weapon Experience and Battlefield Supply

25 June 2015

Patched Zombie Mode Rework
Adopted M134 Vulcan, Dual Kriss Custom and Zombie Grenade 2
Added Premium Decoder and Jackpot Point Box
Added Sapientia and Coil Machine Gun to Bingo
Updated Weapon Experience and Battlefield Supply

11 June 2015

Adopted PGM Hécate II
Resold M14 EBR, Beretta ARX-160, Winchester M1887, M2 Browning and King Cobra (Confirmed Sets)
Held Claim Your Weapon event to achieve the PGM Hécate II
Held Melee Weapons License and Origin Weapons License event
Replaced all old types of Decoder by Mileage Code Decoders
Updated Weapon Experience and Battlefield Supply

4 June 2015

Adopted THANATOS-5 and Norinco Type 86S
Held Claim Your Weapon event to achieve the Norinco Type 86S
Updated Weapon Experience and Battlefield Supply

21 May 2015

Sold Mileage Supply Crate
Added Dart Pistol, [Boxing Headgear] and [Boxing Champion Belt] costumes into Code Box
Patched Sudden Death for Fun mode
Released Mobius
Added Estate and Metro into Zombie Annihilation
Held Timed Bomb and Attendance Checking events
Updated Weapon Experience and Battlefield Supply

7 May 2015

Adopted FNP-45
Recruited Krieg and Ha Ly
Sold Vietnamese Classes Set
Introduced [Non La] Costume
Released Warehouse
Held Claim Your Weapon event to achieve the FNP-45
Held Sudden Attack Cross Event
Updated Weapon Experience and Battlefield Supply

23 April 2015

Adopted THANATOS-9
Released Third Report
Introduced Discount Coupon
Held Special Nightmare event
Updated Weapon Experience and Battlefield Supply

9 April 2015

Adopted PJ MK3A1
Resold M134 Minigun (Confirmed Set) and held Upgrade Event
Held Claim Your Weapon event to achieve the PJ MK3A1
Held Seed event
Updated Weapon Experience and Battlefield Supply

26 March 2015

Adopted Newcomen and Mileage Code Decoder
Released Train Shed for Shotgun Battle
Added [Idol Sunglasses] and [Idol Microphone] Costumes into Code Box
Removed the Code Box (now all Decoders can be used without Code Box)
Updated Bingo system (Bingo now becomes a permanent feature in game)
Held Baseball, Bingo and April Fool's Day events
Rebalanced Zombie Scenario: Season 1 Survival maps: Lost City, Double Gate and Trap
- Reduced the number of rounds to 5
- The completion required to get the respective medals are 400, instead of 100
- The freeze time is reduced
Updated Weapon Experience and Battlefield Supply

12 March 2015

Adopted M950 and Uzi
Held Claim Your Weapon event to achieve the Uzi
Updated Weapon Experience and Battlefield Supply
Fixed some bugs:
- Modified some zombies' abilities
- Modified Battle Veteran
- Deleted Strong Lifepower and Excellent Genes (effect is not removed)
- Reduced the conditions required for zombie enhancement
- Fixed Zombie Escape recording bug

26 February 2015

Updated Craft system
Removed the Special Combat Blueprints and Components
Adopted Lightning Rail and Fire Vulcan
Held Bell event
Updated Weapon Experience and Battlefield Supply
Added new medals: [Exterminator], [Mech Warrior] & [Weapon Master]
Added new achievements

10 February 2015

Adopted THANATOS-11, Crossbow Advance, Horn Kujang and Blood Dripper
Released Memories
Resold Advanced Code Decoder, Code A Decoder and Code B Decoder bundles
Held Crossbow Advance Upgrade Event
Held Valentine, Letter Collecting Event and Bingo events
Updated Weapon Experience and Battlefield Supply

22 January 2015

Recruited Soy and Jim
Sold CSO Assistant set
Released Rising
Held Dual Infinity Upgrade Event
Updated Weapon Experience and Battlefield Supply

13 January 2015

Patched Zombie File
Released First Report and Second Report

8 January 2015

Adopted RPG-7
Held Coin Event
Held Battlefield Supply Upgrade event
Held Enhanced attendance event
Held more Weapon Experience event
Updated some contents:
- Increased Heavy Zombie's health
- Reduced Sting Finger's health
- Reorganized Family Achievement
- Items obtained from Family and extended storage periods will be collected

2014

18 December 2014

Patched Free Update
- Reorganized Zombie Modes
- Improved PvP modes
- Changed some paid weapons and items to be free (default) for all players
- Changed the contents of Combat Blueprint
- Introduced Perfect Pick Recipe item
- Increased the performance of K3
- Reformed Craft system
- Changed the rewards of Special Mission, Daily Mission and Weekly Mission
- Updated the prizes for Promotion reward
- Reorganized Battlefield Supply
- Adopted THANATOS-7 and Tomahawk Christmas
- Resold AS50, MG3, Dual Infinity and Katana
- Sold Combat Blueprints and Durability Materials in shop
- Play CSO to get Christmas Box
- Removed Level Restriction of some weapons
- Fixed Deimos and Ganymede bug, SKULL-9 bug
- Removed Bloody Blade and some Zombie sets
Held Christmas event
Held more Weapon Experience event

4 December 2014

Sold Wizard of Oz set
Reorganized Fun mode and some Zombie Scenario maps
Introduced Paint system
Updated Zombie Annihilation
Held Seoul CSO World Championship 2014
- Gave away SKULL-5 and SKULL-7 WC Editions to the participants
- Gave away CSO WC 2014 spray free (perm) for all players
Held EXP & Point Boost Event on Dust2, Inferno, Train, Santorini and Sanctuary
Held Fun Kill Point Collection Event
Held Bell event
Held Zombie Match event
Held more Weapon Experience event

20 November 2014

Patched Zombie Annihilation
Updated Zombie Enhancement
Added Dominique and Brick Peace V2 into Code Box
Added [Gentleman] Costumes into Code Box
Held Fortune Cookie and Seed events

6 November 2014

Adopted Gilboa Carbine
Held Gilboa Carbine Upgrade Event
Released Madness
Resold OTs-14 Groza for Weapon Enhancement
Held more Weapon Experience event

23 October 2014

Added Papin and Alin to Code Box
Added [Provocation] costumes
Resold KSG-12, ARX-160, AS50 and M60E4
Held Halloween event

7 October 2014

Released Splash
Adopted Crowbar Maverick and K1A Maverick
Resold TDI Kriss Super Vector for Upgrade Event
Resold Maverick [S] Combat Blueprint + Unlimited Durability item set
Held more Weapon Experience event

18 September 2014

Released Hell Ride
Adopted Slasher and Erupt Cannon
Adopted M1 Garand, M1918 BAR, Sten Mk2 and M1911 A1
Sold World War II Set B
Held Seed event
Held more Weapon Experience event

4 September 2014

Held Bingo event
Adopted Rail Cannon and Plasma Grenade
Patched Fight Yard
Released Ice World
Resold JANUS-7 sets
Sold Decoder bundles

21 August 2014

Adopted Mauser C96, MG42, Mosin-Nagant and MP40
Sold World War II Set A
Held World War II Weapons Event
Resold SPAS-12 for Upgrade Event
Held Mosquito event

7 August 2014

Adopted JANUS-3
Released Omen
Released B-Box BLUE
Held Lucky Coin event
Held more Weapon Experience event

24 July 2014

Recruited Henry and Gunsmith
Sold Meister Package
Introduced Manners system
Adopted BALROG BLUE Series
Held Find the Zombies event
Resold Tactical Knife for Upgrade Event
Held Dinosaur costumes event
Held more Weapon Experience event

10 July 2014

Adopted Petrol Boomer
Introduced Zombie Giant
Released Forsaken
Held Time Bomb event

26 June 2014

Added New Zombie Evolution System
Re-balanced some weapons
Added Weapon Experience system
Added Bendita, [Afro Hair] & [Elegant Hair] costumes
Held Bingo Event
Held Code Decoder Blast Event

12 June 2014

Adopted Galil Maverick and M1887 Maverick
Held [Red Indian] Costumes event
Resold SKULL-8, BALROG-III, JANUS-1 packaged with 100,000 points
Resold XM2010, OTs-14 Groza, Parang and KSG-12
Resold Dual Infinity for Upgrade Event
Released Spirit Shot, Summoning Shot and Tornado Shot
Introduced New Classic Battle
Introduced Tutorial Mode for Zombie Scenario and Zombie Mods
Enlarged inventory

29 May 2014

Adopted JANUS-11
Released Paranoia
Clear all Zombie Scenario chapters chronologically to get [Asura] medal and Lightning HZ-1
Kill 1000 zombies in Paranoia to get Poison Gun (1 usage)

15 May 2014

Re:booted ranking system
Introduced Matchmaking
Added Isabelle and Aeolis into Code Box
Resold SL8 for Upgrade Event
Sold Code Decoders bundle set

29 April 2014

Sold Journey to the West set
Released Metro
Resold Cart Rider Best Friend Package
Collect 2014 kill points to get [Dao Head] costume
Play for 3 hours to get [Bazzi Head] costume

17 April 2014

Added Maverick Combat Blueprint
Adopted PSG-1
Added M60E4 Maverick and SPAS-12 Maverick
Resold M2 Browning and Barrett M95 for Weapon Enhancement
Held Battle Weapons, Seed and Special Nightmare events

1 April 2014

Held April Fool Event:
- The players must have accounts, then they have to open the "game modes" section on the official website and choose Zombie 4: Darkness
- Then they must press F8 until a code appeared
- Players can enter the code in-game to receive the following items: B-Box and World Best Set

27 March 2014

Added Cyclone, Lingling and Duration Extender into Code Box
Released Shadow Conqueror set

13 March 2014

Adopted JANUS-9
Released Sanctuary
Rebooted Family system
Held Time Bomb event

27 February 2014

Add new Weapon recipe for SKULL Series, BALROG Series and JANUS Series
Resold JANUS-5 and Double-barreled shotgun
Held Double-barreled shotgun upgrade event
Held Fortune Cookie event

13 February 2014

Rebooted Zombie Shelter: Coop
Released Desert Plants
Added Survival Tools Package
Adopted Machete, Crowbar and Claw Hammer
Held B-Box Giveaway event
Held Valentine event
Held Golden bell giveaway event

28 January 2014

Re:boot Zombie Scenario
Released Envy Mask
Recruited Choi Ji Yoon (Limited Edition) and Michaela (Limited Edition)
Added Gae Bolg, MP7 Unicorn, and Horse Axe
Sold Decoders bundles
Resold SKULL-4
Added Dual Infinity to shop
Resold Combat Knife and held Combat Knife upgrade event
Held Kite event
Held Bingo Event and Letter Collecting Event
Log in specific days to receive Fortune bag

16 January 2014

Released Shoreline

9 January 2014

Patched Zombie 4: Darkness
Adopted M2 Browning
Released Dark City
Kill the zombies at the end of the round to get Zombie 4: Darkness supply box or key
Held Coin Event

2013

19 December 2013

Adopted M1887 Xmas
Added Advanced Enhancement Kit and Craft Item Duffel Bag
Resold BALROG-I and BALROG-IX
Resold ARX-160 for Weapon Enhancement
Added new medals: [Enhancer] & [Mother of Success]
Re:booted Craft system
Added Zombie 4: Darkness supply box
Held Christmas event

05 December 2013

Added Savery and PKM Gold into Code Box
Rebooted Clan system
Rebooted Ranking system

21 November 2013

Adopted Groza
Clear Zombie Shelter: Coop/Team Match to receive Soy's SD Zombie Maker
Held Golden bell giveaway event
Held B-Box giveaway event
Updated Battlefield Supply

14 November 2013

Patched New Zombie Shelter
Released Dead City

07 November 2013

Adopted JANUS-1
Added new medals: [Last Survivor] & [Unauthorized Dismantle]
Updated Battlefield Supply
Held Time Bomb event

24 October 2013

Introduced Dedicated Server
Reform Medal system
Added new medals for Zombie Scenario: Season 3, Encounter and Beast mode
Clear all Zombie Scenario: Season 3 chapters, Encounter and Conspiracy to receive Lightning LZ-1
Log in to receive Pumpkin Grenade and costumes
Added Drill and G11 Gold into Code Box
Updated Battlefield Supply

10 October 2013

Invented JANUS-7
Discovered Illusion
Held Baseball event
Updated Battlefield Supply
Play 30 minutes to get Illusion Key

26 September 2013

Recruited Walter and Carlito
Resold HK G11 for Weapon Enhancement
Held Golden bell event
Updated Battlefield Supply

12 September 2013

Adopted JANUS-5
Released Conspiracy
Held Bingo Event
Added Compound Bow and UTS-15 Pink Gold to Bingo prizes
Introduced B-Box
Updated Battlefield Supply

29 August 2013

Adopted ARX-160
Released Dark Snow
Held Time Bomb event
Updated Battlefield Supply

13 August 2013

Adopted Tactical Knife
Held Tactical Knife Upgrade event
Held Mosquitoes Eradication event
Updated Battlefield Supply
Resold Christmas Edition Weapons

01 August 2013

Adopted SKULL-6
Released Encounter
Held Big Head Event
Updated Battlefield Supply

25 July 2013

Resold BALROG-I, BALROG-V, BALROG-VII and BALROG-IX

18 July 2013

Adopted Battle Weapons
Released Joker Character
Added [Polar Head] and [Penguin Doll] costumes
Updated Battlefield Supply

04 July 2013

Patched Beast mode
Updated Custom Start menu
Released Cold Fear
Adopted Leviathan
Updated Battlefield Supply

27 June 2013

Adopted SKULL-8
Held Bingo Event
Added Plasma Gun and Beam Sword into Bingo Event prizes
Added Green Dragon Blade into Coded Box

20 June 2013

Adopted AWP-Z
Released Hitchhiking
Held Ice event

04 June 2013

Held SPAS-12 Cobra Upgrade event
Added Weekly Ranking system

30 May 2013

Introduced AFK Host Auto-kick system
Adopted AK-74U
Added [Squirrel] costumes
Updated Battlefield Supply

14 May 2013

Adopted BALROG-XI
Held Dual Infinity Upgrade event
Updated Battlefield Supply
Held Code A Decoder Giveaway event

02 May 2013

Resold Cart Rider Best Friend Package
Added [Kart] costumes
Clear all Zombie Scenario maps to get Lightning HZ-1

23 April 2013

Released Panic Room
Clear Panic Room to receive Jiang Shi (permanent)
Added [Panda] costumes
Introduced Origin Weapons License
Added Needler and King Cobra Gold into Coded Box
Updated Battlefield Supply

11 April 2013

Adopted SKULL-4
Launched Facebook page

04 April 2013

Introduced Baseball event
Sold SKULL-4 Reservation Ticket

28 March 2013

Released Lusty Rose
Introduced M16A1 Veteran
Added [E], AT4-CS and Lightning AR-2 sprays
Held Seed event
Held Reversed Map event
Updated Battlefield Supply

14 March 2013

Released Santorini
Adopted BALROG-III
Introduced Code B Decoder
Added FG-Launcher and MG36 Gold into Coded Box
Collect 100 special points to receive Lightning LZ-1 permanent
Log in to receive Heart bomb and Heart spray
Updated Battlefield Supply

26 February 2013

Adopted K3
Added [Pig] costumes
K3 and UTS-15 can be enhanced now
Updated Battlefield Supply

14 February 2013

Held Triple-barreled shotgun Upgrade event

07 February 2013

Adopted UMP45 Snake
Added Serpent Blade and Ripper
Held Bingo Event and Stingray Kite events
Introduced [Golden Armor] costumes
Added [Rescue Elite] medal
Updated Battlefield Supply

31 January 2013

Adopted BALROG-I
Released Threat
Updated Battlefield Supply

17 January 2013

Patched Zombie Shelter
Recruited Alice (Limited Edition) and Yuri (Limited Edition)
Released City of Damned

03 January 2013

Patched Rush Battle
Adopted HK G11
Released Urban Assault
Updated Battlefield Supply

2012

20 December 2012

Added [Christmas] costumes
Log in to receive Christmas hat and spray
Adopted MG36 Christmas Edition
Resold MG3, M134 Minigun and Barrett M95 Christmas Editions
Updated Battlefield Supply

06 December 2012

Adopted BALROG-IX
Released Behind
Updated Battlefield Supply

22 November 2012

Held Lucky Coin event
Added Thunderbolt and Double-barreled shotgun Gold into Coded Box
Released [Last Soldier] & [Infecter] medals

13 November 2012

Introduced Comrade
Adopted M249 Veteran

08 November 2012

Adopted UTS-15
Held Kriss Super V Upgrade event

25 October 2012

Released Venice
Added [Halloween] costumes
Added OICW and M60E4 Gold into Coded Box

11 October 2012

Adopted M16A1
Held Silver bell and Golden bell events
Resold Parkerhale M82 and PKM for Weapon Enhancement

25 September 2012

Released Contact
Adopted BALROG-V
Added Volcano, P90 Lapin and Cannon into Coded Box
Held Full Moon event

13 September 2012

Introduced costumes
Added Dust Zero and Angel City to other modes

30 August 2012

Released Angel City
Adopted King Cobra
Added [Firefighter], [Bot Zombie Master] and [Reliable Assistant] medals

16 August 2012

Held SL8 and Combat knife Upgrade events

09 August 2012

Adopted Lightning LZ-1
Adopted Lightning HZ-1
Released Poisoning
Held Seed event

02 August 2012

Released Skyline
Resold WA2000 for Weapon Enhancement

26 July 2012

Held Mosquitoes event
Held M134 Minigun Upgrade event

12 July 2012

Released Angra Nest
Adopted BALROG-VII

28 June 2012

Patched Z-VIRUS
Released Forbidden
Unleashed Venom Guard and Sting Finger
Adopted M32 MGL
Added Ethereal and Wild Wing to Bingo Event
Added Lightning AR-2 and M14 EBR into Coded Box

14 June 2012

Patched Basic mode
Released Dust Zero
Resold AS50, KSG-12, StG 44 and HK23E for Weapon Enhancement

31 May 2012

Adopted M249 Camouflage
Released level-restrict weapons
Introduced Weapon Enhancement
Added Normal Enhancement Kit and Anti-Enhancement Material
Added Lucky Gunman
Resold M14 EBR and XM2010

17 May 2012

Added Soy's SD Zombie Maker
Adopted Parkerhale M82

03 May 2012

Added [Phoenix] and [Weapon Specialist] medals
Added Shooting Star and KSG-12 Gold into Coded Box
Held Dual Infinity Upgrade event
Adopted Cart Rider Best Friend Package

19 April 2012

Adopted SKULL-11
Released Decoy
Resold MG36, M79 Saw off and Wedung

05 April 2012

Adopted Tomahawk
Added Gallery, Inferno and Checkmate to Gun Deathmatch

22 March 2012

Patched Gun Deathmatch
Recruited Raven and Michaela

08 March 2012

Added Avalanche and StG 44 Gold into Coded Box
Held Silver bell and Golden bell events

23 February 2012

Adopted MK48
Released Culvert

19 January 2012

Added AWP and M24 into Coded Box
Recruited Jennifer (Army) and Natasha (casual)
Held Letter Collecting Event
Added Black Dragon Cannon and TMP Dragon as the main prizes

12 January 2012

Adopted SKULL-3
Patched Zombie Escape
Released Blood Castle

2011

22 December 2011

Patched Hidden
Added [Hawk Eye] and [Meister] medals
Added Tempest and M79 Saw off Gold into Coded Box
Adopted Barrett M95 Christmas Edition

08 December 2011

Introduced Zombie Mods Clan Battle

24 November 2011

Adopted SPAS-12
Held SPAS-12 Upgrade Event

10 November 2011

Introduced Character Emotion
Recruited Enzo
Recruited Lucia

27 October 2011

Updated Human Scenario
Released Sidewinder
Added [Dione Chaser], [Comanche Hunter], [Osprey Hunter] and [Gear Breaker] medals
Adopted AT4-CS
Sold AT4 in points

13 October 2011

Patched Team Deathmatch: Item Battle
Released Checkmate
Adopted PKM

22 September 2011

Patched Zombie Scenario: Season 2
Released Toxicity
Adopted SKULL-1

08 September 2011

Added Dragon Tail and HK23E Gold into Coded Box
Resold MG36

25 August 2011

Released Suzhou
Added [Godlike] medal
Resold PLA and May

11 August 2011

Added [CSO Champ] medal
Added [CSO Challenger] medal
Adopted StG 44

28 July 2011

Held M134 Minigun Upgrade event
Introduced Code A Decoder
Added Lightning SG-1 and Flintlock into Coded Box
Added MG3 Gold and MP5 Gold into Coded Box

14 July 2011

Released Origin
Adopted Holy Bomb and Silver Luger
Recruited Fernando and Blair
Unleashed Stamper

30 June 2011

Adopted Salamander
Released Requiem and Rest
Unleashed Banshee

16 June 2011

Adopted AS50
Added more Tattooes

02 June 2011

Adopted KSG-12

19 May 2011

Resold SL8
Held SL8 Upgrade event

03 May 2011

Resold Kriss Super V
Held Kriss Upgrade event

26 April 2011

Released Nightmare
Added Blaster and WA2000 Gold into Coded Box

21 April 2011

Introduced Map Advancement
Added [Patron] and [Biker Gang] medals

31 March 2011

Recruited Keith Icahn
Recruited Spade
Added Special Mission Reset
Added April Fool sprays

24 March 2011

Resold Dual Infinity
Resold Combat knife
Held Dual Infinity Upgrade event
Held Combat knife upgrade event

17 March 2011

Adopted Thompson Chicago and Luger P08
Released Industry2
Added Tattooes

03 March 2011

Adopted MG36

17 February 2011

Adopted SKULL-5
Introduced Craft
Released Dead End

27 January 2011

Held Mosquitoes event
Adopted P90 Lapin
Adopted Volcano

20 January 2011

Released Quasar
Recruited Alice
Added [Conqueror], [Home] and [Metal Hero] medals

06 January 2011

Added Ganymede
Added Bloody Blade

2010

16 December 2010

Patched Metal Arena mode
Released Metal Gate map
Adopted SKULL-9

02 December 2010

Adopted M60E4
Adopted M16A4 and AN-94
Released Port
Renamed all classic weapons
Improved Ban List system
Added [Winner], [Specialist], [Perfectionist], [God of Mission] & [Avenger] medals