Non-playable character

There are some characters that are not roled by the players. The list below shows the non-playable characters in Counter-Strike Online.

Missions
Daily mission=

Weekly mission=
 * Senior Researcher Soy or Doctor Aegis: A Weapon development researcher for zombie countermeasure purpose.
 * Evelyn: An unidentified female character.
 * Signalman Felix: A signalman of government.
 * Douglas Jacob: An unknown agent from government.
 * Commander Victor: An american troop's captain.
 * Red Lizard Jim: Head in charge of a PMC group (Private Military Contractors).
 * Rowen: A support class captain of an unknown special forces.
 * Chen: The Secretary for Security of an unspecified sector.

Craft

 * Henry Stoner: A master craftsman who has accumulated a lot of gun manufacture experience throughout his years of craftsmanship.



Troops and Zombies
Zombies= Mini-Boss= Special= Vanguard Troops=
 * Regular Zombie: Normal zombies with medium attack damage and speed. The origin one has higher health.
 * Light Zombie: Has faster movement speed, attack rate and is harder to be killed than regular zombies although it has lower health.
 * Heavy Zombie: More durable and does higher damage than regular zombies, but moves slower. Can release a trap to lock human's movement for a while.
 * Voodoo Zombie: An infected witch doctor that heals other zombies and has greater health points.
 * Psycho Zombie: An infected surgeon who releases a black smoke to disturb human's concentration.
 * Sting Finger: An infected female researcher who has a longer range attack which deals higher damage than regular zombies.
 * Venom Guard: An infected security guard who explodes upon death. The death blow can injure and knock humans away.
 * Pierrot: A weak, harmless snowman which appears in Bonus Rounds only.
 * Hound zombie: A stray guard dog which was infected by the zombie virus.
 * Parkour Zombie : A zombie which appears in Omen with the ability to climb up walls.
 * Juggernaut: Evolved version of the Heavy Zombie which appears as a mini-boss.
 * Deimos: Appears as a mini-boss.
 * Ganymede: Evolved version of Deimos which appears as a mini-boss or boss (extra-chapters).
 * Crasher Zombie: Blue colored Heavy Zombie which has stronger health and attack power.
 * In Threat chapter, there are also blue colored Regular Zombies, however, their function and health has no different with normal Regular Zombies.
 * In Hell Ride, starting from Day 22, blue colored Juggernaut will appear. However, their function and health has no different with normal Juggernauts.
 * Pursuer Zombie: Purple colored Light Zombie which has fast movement, high jump and extreme attack damage.
 * Stalker Zombie: Black colored Light Zombie which has slightly faster movement.
 * In Envy Mask chapter, there are also black colored Regular Zombies with the same function.
 * Thrower Zombie: Green colored Regular Zombie which throws Zombie Grenade.
 * There are also green colored Light Zombies and Heavy Zombies with the same function, note that they only appear in Lost City, after Scenario Re:boot.
 * Enhanced Zombie: Orange colored Regular Zombie which has high health and attack power.
 * Red-colored Zombies: Unknown by name, these zombies have slightly higher health and attack power. They appear with different types of the origin zombies. They make their first appearance in Round 2 of Last Clue.
 * Dark-blue-colored Ganymede: Unknown by name, these zombies appear in New Zombie Shelter maps, and have the same functions with normal Ganymede.
 * In Desert Plant, when Angra appears, it will fly to the player's shelter to throw some Venom Guards and other special zombie types, which come in a dark-blue colored skin. Those zombies have more health and damage than normal ones.
 * Trooper: The most common Vanguard troop who appears in all Human Scenario maps.
 * Titan: Heavily-armored minigunner.
 * Ghost: Desert-camouflaged sniper of the Vanguard troop.
 * Lancer: Specialized rocket launcher of the Vanguard troop.
 * Heavy Titan: The chief commander of the Vanguard troop.
 * Drone: Only appears in Blaze and assists the Osprey to attack the players.

Zombie Scenario
Season 1= Season 2= Season 3= Season 4= Season 5=
 * Prototype Phobos: A boss which appears in Last Clue and Nightmare.
 * Siege Type Phobos: A boss which appears in Chaos and Nightmare.
 * Oberon: A boss which appears in Dead End and Nightmare.
 * Dione: A boss which appears in Toxicity and Poisoning.
 * Siege Type Dione: A boss which appeared in Culvert and Decoy, but can't be harmed.
 * Revenant: A boss which appears in Decoy and Poisoning.
 * Angra: A powerful boss which appears in Angra Nest and Poisoning.
 * Mutated Heavy Titan: An infected Heavy Titan which appears in Contact and Illusion.
 * Bio Scorpion: A mechanic scorpion which appears in Behind and Illusion.
 * Mad Machine: A boss which appears in Threat, Panic Room (mini-boss) and Illusion.
 * Kraken: A boss which appeared in Panic Room.
 * Frozen Terror: An infected Yeti which appears in Encounter, and as mini-boss in Envy Mask and Paranoia.
 * Gluttony: A fat, dragon-like boss which appears in Conspiracy and Envy Mask (hologram only).
 * Neid and Zavist: Two mutated females clones who appeared in Envy Mask and Paranoia (mini-bosses).
 * Dr. Rex: The mad scientist who finally had shown up in Paranoia and infected himself with the zombie virus.
 * Kraken: Appeared as a mini-boss in Paranoia, but only the tentacles.
 * Laser Wing: An infected grasshopper-like creature which appeared in Omen.

Human Scenario

 * RAH-66 Comanche: A boss appears in Desert Storm and Hellfire to engage the players. In Sidewinder, it becomes the players' ally.
 * V-22 Osprey: A boss appears in Blaze.
 * XT-300 Goliath: A boss appears in Sidewinder.

Scenario guide
Zombie Scenario 1= Zombie Scenario 2= Zombie Scenario 3= Zombie Scenario 4= Zombie Scenario 5= Zombie Escape= Human Scenario= Zombie Shelter=
 * Choi Ji Yoon: Appeared to support the player in Chaos.
 * Senior Researcher Soy or Doctor Aegis: Appeared to support the player in all the chapters of Zombie Scenario 2 (including extra-maps).
 * Norman: Zim's most trusted person, appeared in Contact, Threat, Panic Room and Illusion.
 * David Black: An AFC member, appeared in Behind, Threat, Panic Room and Illusion.
 * Erika: An AFC member, appeared in Behind, Threat, Panic Room and Illusion.
 * Victor: Appears to support the player in Illusion.
 * Red Lizard Jim: Appears to support the player in Illusion.
 * Gerard: Appeared in all chapters of Zombie Scenario 4 to support the player.
 * Red Lizard Jim: Appeared to support the player in all the chapters of Zombie Scenario 4.
 * Unknown NPC (Dr. Rex): Appeared in Conspiracy and Envy Mask as mysterious antagonist character.
 * Dr. Rex: Showed his true face in EnvyMask and later in Paranoia as final boss.
 * Jennifer: Appeared in Omen to support the player.
 * Unknown NPC (Gerard): A member of the Counter-Terrorist appeared to guide the remainining survivors to escape from the zombies in Hitchhiking.
 * Red Lizard Jim: Appeared to guide the remaining survivors to escape from the zombies in Hitchhiking.
 * Victor: Appeared to support the player in Desert Storm, Hellfire and Sidewinder.
 * Red Lizard Jim: Appeared to support the player in Blaze and Sidewinder.
 * Felix: Appeared to support the player in City of Damned (Old).

Events

 * Mosquito - Insect which appears in Zombie modes during summer, to be killed to obtain great prizes.
 * Kite - A flying 'monster' which appears during Lunar New Year.
 * Teddy Terror: A boss which appears in Nightmare and only during a specific event.