I don't have any idea :( so I just only fun fact like CSO patch.
Update 1[]
Patch 1[]
- Held Close Beta Test (CBT)
- Added all CS 1.6 and CSCZ maps
- Added all CS 1.6 weapons permanent
- Added CS 1.6 factions
Patch 2[]
- Added Team Deathmatch, Deathmatch and Basic modes
- Added CSO factions
- Fixed some bugs:
- Increased HE Grenade damage
- Deleted Shield in CT
Patch 3[]
- Added shop and craft system
- Added some weapons (point weapon)
- Added limit mode
- Added Annihilation mode:
- Added Dust2A, Another Episode and Gallery maps
- Play twice times in Annihilation mode to get FN SCAR H and XM8 Sharpshooter permanent
- Fixed some bugs:
- Added some HUDs
- Fixed in scope AWP
Patch 4[]
- Added Mission system
- Added some medals
- Added Warehouse map
- Fixed HUD in bomb mission
Update 2[]
Patch 1[]
- Held Open Beta Test (OBT)
- Renewal lobby and create room
- Added Free Update and Grievance Update
- Added Tutorial Mode
- Clear 6 missions to get one from all Golden firearms permanent
- Added Level ranks
- Added some female characters
- Added some weapons (cash weapon)
- Added some items
- Added Combat Blueprint system
- Added Mileage Decoder and Code Box
- Added Bingo, Promotion reward and Battlefield Supply:
- Day 1: 1 Mileage Decoder
- Day 2: 2 Mileage Decoders
- Day 3: 3 Mileage Decoders
- Day 4: 4 Mileage Decoders
- Day 5: 1 Mileage Coupon Level 1
- Day 6: 1 Mileage Coupon Level 2
- Day 7: 1 Mileage Coupon Level 3
- Added Golden firearms into code box
- Fixed some bugs:
- Increased AK-47 and M4A1 damage
- Deleted Weapon Recipe
- Renew some textures
Patch 2[]
- Added Camouflage and Camouflage 2
- Save 20 times hostage in Camouflage or Camouflage 2 to get once from all Premium weapons permanent
- Added some male characters
- Added Premium weapons into code box
- Fixed hostage models
Patch 3[]
- Added Dazzling, Toscana, Dust Zero, Angel City, Rex and Santorini maps
- Plant 5 times in Original mode to get once from all Lightning series permanent
- Plant 30 times in Basic mode to get once from all Lightning series permanent and 10 Mileage Decoder
- Defuse 10 times in Original or Basic mode to get 10 Mileage Decoder
- Added Lightning series into code box
- Renewal C4 model
Patch 4[]
- Added Industry, Industry2, Port, Suzhou, Tunnel and Rats maps
- Kill 100 times in Annihilation mode to get RPG-7 permanent
- Added RPG-7
- Added some weapons into bingo
- Added some characters into code box
- Fixed some bugs
- Decreased time in Annihilation from continue 00.00 to finish in 00.00 (this game will round draw)
- Fixed some weapons
Update 3[]
Patch 1[]
- Added Zombie modes:
- Day 1: Zombie 1: Original
- Day 2: Zombie 2: Mutation
- Day 3: Zombie 3: Hero
- Day 4: Zombie 4: Darkness
- Added zombie's characters permanent into inventory
- Added Salamander, AT4-CS, M32 MGL, Leviathan, M79 and Tactical Knife weapons
- Added Zombie Mode Rework
- Added Abyss, Abyss2 and Abyss3 maps
Patch 2[]
- Added Zombie Origins, Z-VIRUS and Z-Noid
- Play 2 hours in Zombie mode in 1 day to get 3 Mileage Decoder
- Added Nata Knife, Hammer and Heavy Zombie Knife permanent into inventory
- Added Exorcism Legends characters
- Added Requiem, Rest, Origin, Forbidden, Dark City and Shoreline maps
- Fixed some bugs
- Removed some maps in Zombie 4: Darkness
- Improved weapon special to equipment
- Added Supply Box into Zombie Mutation and Hero
Patch 3[]
- Added Bot Zombie Mod and Zombie: The Union modes
- Added Big Tree, Metro, Farero and Union maps
- Added Science Fiction series into code box
- Added Premium Decoder
- Login to get 1 Premium Decoder
- Play 30 minutes to get 5 Premium Decoders
- Clear 5 daily missions to get 10 Premium Decoders
- Kill 100 zombies in one day to get 10 Premium Decoders and one from all Science Fiction series permanent
Patch 4[]
- Added Zombie Escape mode
- Added Blood Castle, Skyline, Venice, Hitchhiking, Rising and Rhyzome maps
- Escape 100 times to get SVD Custom or Quad-barreled shotgun permanent (exclude zero zombies)
- Kill 500 human to get M134 Vulcan or Dual Kriss Custom permanent
- Added CROW-5 and CROW-7
- Improve Hackshield to Xigncode
Update 4[]
Patch 1[]
- Added Re:boot system
- Added Scenario mode
- Day 1: Zombie Scenario: Season 1
- Day 2: Human Scenario
- Day 3: Zombie Scenario: Season 2
- Day 4: Zombie Scenario: Season 3
- Day 5: Zombie Scenario: Season 4
- Added storyline system from Lost City
- Added SKULL-1, SKULL-3, SKULL-5, SKULL-7, SKULL-9 and SKULL-11
- Added some events:
- Complete Zombie Scenario: Season 1 to get SKULL-7 and SKULL-11 permanent + Pilgrim medal
- Complete Human Scenario to get SKULL-5 permanent
- Complete Zombie Scenario: Season 2 to get SKULL-3 permanent
- Complete Zombie Scenario: Season 3 to get SKULL-1 permanent
- Complete Zombie Scenario: Season 4 to get SKULL-9 and all Science Fiction series permanent + Asura medal
- Added some weapons in bingo
- Fixed bug record in Zombie Escape
Patch 2[]
- Added Zombie File mode
- Day 1: First Report
- Day 2: Second Report
- Day 3: Third Report
- Added storyline from First Report
- Added SKULL-2, SKULL-4, SKULL-6 and SKULL-8
- Complete First Report to get SKULL-2 permanent
- Complete Second Report to get SKULL-8 permanent
- Complete Third Report to get SKULL-4 and SKULL-6 permanent
- Complete all Zombie File maps to get all SKULL Series permanent
- Fixed some bugs:
Patch 3[]
- Added Zombie Scenario: Season 5:
- Day 1: Omen
- Day 2: Memories
- Day 3: Another Truth
- Day 4: Last Ride
- Added BALROG-I, BALROG-III, BALROG-V, BALROG-VII, BALROG-IX and BALROG-XI
- Complete Omen to get BALROG-VII permanent
- Complete Memories to get BALROG-V and BALROG-IX permanent
- Complete Another Truth to get BALROG-I permanent
- Complete Last Ride to get BALROG-III and BALROG-XI permanent
- Complete all Zombie Scenario: Season 5 to get all BALROG Series permanent
- Complete all Scenario maps to get all SKULL Series, BALROG Series, Science Fiction series and Lightning series permanent
- Fixed some bugs
- Decreased round all Zombie Scenario Survival to 5
- Increased time Trap from 2 to 3 minutes
Patch 4[]
- Added Zombie Scenario Special:
- Added JANUS-1, JANUS-3, JANUS-5, JANUS-7, JANUS-9 and JANUS-11
- Added X-mas weapons into code box
Update 5[]
Patch 1[]
- Added Paint
- Added New Zombie Shelter mode
- Day 1: Dead City (Co:op)
- Day 2: Dead City (Team)
- Day 3: Desert Plant
- Day 4: Hell Ride
- Update Zombie Scenario Z-Noid
- Added THANATOS-1, THANATOS-3, THANATOS-5, THANATOS-7, THANATOS-9 and THANATOS-11
- Added Upgrade Event
- Resold all weapon upgrade
- Added Stingray Kite and Mosquitoes
- Added some events:
- Defeat boss until 30 days in one day to get all THANATOS Series permanent
- Total day-15 to get one from THANATOS Series permanent
- Total day-30 to get two from THANATOS Series permanent
- Total day-100 to get all THANATOS Series permanent
- Kill 100 times Stingray Kite in Assault and Farero to get 10 Mileage Decoder + Kite medal
- Kill 100 times Mosquitoes in Rats and Origin to get 10 Mileage Decoder + Mosquitoes medal
- Fixed some bugs:
Patch 2[]
- Added Zombie Annihilation mode
- Added VULCANUS Series
- Added Sanctuary, Snow Base and Mirage
- Resold all characters
- Added Zombie DNA
- Update Battlefield Supply
- Day 1: 1 Random Combat Blueprint Grade S
- Day 2: 1 Permanent Durability Material
- Day 3: 10 Duration Extender
- Day 4: 10 Mileage Decoder
- Day 5: 30 days random weapon
- Day 6: 1 Perfect Pick Recipe random
- Day 7: 5 Mileage Coupon Level 3
- Fixed some bugs
- Fixed infinity experience in level 72
- Changed icon in level 79++
- Added Nexon Security Guard