Counter Strike Online Wiki

For previous stage, see Tiamat MK-3.

Tiamat MK-4 or Cyberpunk Tiamat-X4 is a Unique grade assault rifle in Counter-Strike Online.


Empty slot This weapon has Part System installed.

The final model of the Tiamat Project, developed based on the Plasma Gun. It is an assault rifle that fires 80 rounds of plasma energy. It becomes more powerful with continuous fire. It is capable of using a shockwave attack that knocks back enemies, as well as a condensed plasma rounds.

Detailed Functions[]

  • Press RMB to generate shockwaves to deal Normal 0, Zombies 5, and Scenario 10 damage.
  • Hold RMB to collect energy and release condensed plasma bullets when fully charged. Deals damage Normal 110, 2950 Zombies, and 3500 Scenarios.

Release date[]

  • South Korea: 24 September 2020.
  • China & Taiwan/Hong Kong: 29 September 2020
  • CSN:S: 7 October 2020.

Comparison to Tiamat MK-3[]


  • Has Parts system installed
  • More accurate (+1%)
  • Higher knockback power (+1%)
  • Larger magazine size (+10)
  • Shorter reload time (-0.5 second)
  • Same recoil (17%)
  • Same rate of fire (88%)
  • Same weight (9% speed reduction)
  • Same stun power (38%)
  • More expensive (+$1600)
  • Lower damage to zombies (-61)
  • Available in last level of paid Season Pass


Shoot sound A

Shoot sound B

Explosion sound