Counter Strike Online Wiki

Small banner Zombie: The Mutation (Zombie Mode 2) is a sequel to the Zombie: The Original mode.

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As the humans mainly had advantage over zombies in its predecessor, this new mode introduces new variants of zombies and their unique abilities for zombies to find a fighting chance.

New Additions[]


Zombie regenerate example

Example of health recovering

The zombies have grown stronger, now they are able to heal their injuries by standing still without receiving any damage. Host zombies regenerate at a rate of 400 HP/s and 200 HP/s for lesser zombies.

Heal sound

Ditto, Light Zombie and other female zombies

Ditto, Heavy Zombie and Venom Guard


Kills indicator

Icons show human kills needed to evolve

Keep in mind that humans' blood is the source of the zombie's strength. Do not allow them to massacre your comrades or they will evolve to powerful zombies.

A lesser zombie can evolve into a host zombie by infecting 3 human players in a single round. They now can use special abilities that only the host zombie possesses. Their maximum health points is also boosted to 7000HP.

If the host zombie manages to accumulate its infection to a total of 5 kills in a single round, it will evolve into a prime zombie which has a very high lifepoints and armor (14000HP).

A male zombie evolving sound

Ditto, female

New Zombie Types[]

Type Ability Explanation Pros Cons
Normalzombi Berserk Increases both movement speed and knockback resistance for 10 seconds. Consumes 1000 health points upon use. Press G to activate Origin Zombie's ability. - -
Lightzombi Invisible Become invisible for a limited amount of time but its movement speed is reduced and cannot heal while using its "hide" ability. Humans can detect their invisibility by looking at its shadow, activating the night vision goggle or throwing a smoke grenade. Higher jump height and movement speed Low knockback resistance
Heavyzombi Trap Ability to set a trap on the floor to immobilize humans. The trap will disappear after 20 seconds if there are no victims trapped. The zombie's huge body size makes it an easy target. It also has high knockback resistance. High knockback resistance and crawling speed Low jump height and movement speed
Pczombi Smoke screen Releases a black dense smoke to block the human's field of view. - -
Doctorzombi Heal Replenish nearby zombies' health and armor points. Furthermore, they are able to locate their teammates. - -


Supply boxes[]

Supply box

The Supply Box

Main article: Supply box.

Supply boxes are spawned randomly in the map every 20 seconds to provide support for the fight against the zombies. When pressing E on the box, the players will open the buy menu to purchase weapons. They also obtain these items automatically: Night Vision Goggles, full ammunition and grenades set.


Abyss 2[]

Zm abyss2 cso
Main article: Abyss2

There is a new rescue mission assigned by the headquarters and they confirmed that the survivors were left behind in the building of Rex Research institute, B-1. The journey is not that straightforward as the player will need to make a tour through block C before reaching their location.

Beware of the zombies attack and keep a look out at all times, as it can be hiding anywhere in the building. Clear all zombies in the area and save your comrades.


This mode introduces a new powerup, which benefits both zombie and humans.

Bomb Specialist
Main article: Bomb Specialist.
  • Humans: Players now can carry two grenades of their choice.
  • Zombies: Zombies now can use the Zombie Grenade.


Title Description Task
An evolution is the truth. A best zombie player who conducts continuous evolution. Redacted



  • Exclude Human skills in the [Classic] option
  • Evolution system not applied when [Classic] option is checked
  • Changed damage ratio balance of some zombies
  • Added Zombie Mutant to Studio mode
  • Added classic option (parts, supply box, skill, restrictions on use of zombies, etc.)
  • Added auto-hunting function
  • Added bot AI