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The Anti-Zombie Double Action Revolver
- SG/MY official description
Ct icon small
Tr icon small
Cso logo small
  • SK1
  • Skull Revolver
  • Skull Pistol
  • 噬魂Skull-1 (China)



Rex Research Institute

Added since

13 February 2013

27 March 2013


Usa flag

Obtained by

Btn store@n

Cash point

South Korea
9800 (Permanent)

Taiwan/Hong Kong
349 (Permanent)

80,000 (Permanent)
200,000 (permanent + 30 Code A Decoder)

11,500 (Permanent)
24000 (Permanent + 30 Code Decoder)

Price in match


Base damage
  • A: 47
  • B: 30
Accuracy in long range
  • A: 28%
  • B: 30%
  • A: 30%
  • B: 18%
Rate of fire
  • A: 84%
  • B: 88%
Percentage speed reduction

0% (1.95 kg)

Knockback Power


Stun Power

High~Extremely High

Magazine Size

7 / 35

Fire Mode



.50az hud

Reload Time

2.5 seconds

Secondary fire / Modes

Skull1 desc

Used by

Ct icon Tr icon

System name


Room restrict limitpistolSkull-1 is a part of Skull series which is an anti-zombie revolver built by the Rex Research Institute in Counter-Strike Online possibly based on the Russian-made top-break reloading action, MP412 Rex.


Skull-1 is a double-action revolver chambered with 7 rounds of .50 Anti-Zombie. It has two firing modes; semi-auto and full-auto fire. Semi-auto fire mode deals high damage but lower accuracy and lower rate of fire while the full-auto fire mode has higher rate of fire, higher accuracy but does lower damage.

Skull-1 is accurate in any fire mode and very powerful against both zombies and humans as a secondary weapon, its performance is maximized at middle to close range combat. It can be very useful at times if you have proper skills though it is a bit inaccurate at long range combat.


  • Very high damage to both zombies and human
  • Very high accuracy for a high-caliber revolver
  • Has full-auto fire mode
  • Does not affect player's speed
  • Penetrates Kevlar and multiple objects (up to 4 objects in a row)
  • High stun to zombies
  • Medium knockback for light and normal types zombies
  • Fast reload time
  • Can stop the movement of zombie in zombie scenario


  • Low magazine capacity
  • A bit Inaccurate at long range
  • Expensive for a revolver


Skull-1 was released on:

Taiwan/Hong Kong


  • 29 August 2012 There was resold alongside Skull-9, M134 Minigun upgrade and Franchi SPAS-12 upgrade events.
  • 13 February 2014 There was resold alongside Envymask, Choijiyoon (Limited Edition) and Michaela (Limited Edition).




Mode Purchase cost Ammo cost Total
Original $1200 $350 (35 rounds) $1550
Scenario $1200 $6020 (600 rounds) $7220
Damage statistic (Normal mode)
Range 0m 36m
Armor Yes No Yes No
Head 129 141 92 101
Chest 52 57 44 49
Gut 56 60 49 53
Leg 30 32 26 29
  • In Zombie Scenario, Skull-1 can give a long stun to Pursuer-type zombie.
  • Be careful when buying Skull-1's ammo in Scenario, 600 rounds will burn out your money real fast.
  • It is very accurate, aim for the head with semi-firing mode for massive damage (~250+ to zombies and ~125+ to human).
  • Use the semi-auto fire mode to deal with enemy in far distances while full-auto fire mode if enemy is close to you.
  • Skull-1 is a good barrier destroyer too in Scenario modes.

Tactics facing Skull-1 User

Normal matches

  • Skull-1 users are dangerous if the player have experienced Skull-1 abilities because it is more accurate than most high-caliber pistol. Be aware to battle with Skull-1 user in close to middle range.
  • Skull-1 will take you down immediately with just 1 shot to the head or 2-3 shots to the body despite wearing Kevlar and Helmet. Try to not counter them in close range unless you have good skills.
  • Avoid direct combat alone but work in groups. Skull-1 users will not have enough ammo to kill you.
  • Surprise attack is recommended.
  • Do not run in a straight line or stand still, 1 shot to the head can perform instant kill.
  • This weapon can be an appropriate replacement for the Desert Eagle in normal matches.

Zombie Mods

  • If you have a massive amount of 5000 HP and more, feel free to infect Skull-1 users if they do not have a good primary and melee weapon.
  • Use zombies with small hitboxes like Light Types to minimize the chance of being shot at. Bunnyhop if possible.
  • Heavy types is also recommended when facing Skull-1 users too due to Skull-1's low knockback.
  • Shoot zombies when they are in midair to knock them away. Note that it is not working to heavy types zombies like DeimosGanymede or Heavy zombie.
  • Equip this weapon as your secondary in case you are shocked by Deimos and need to escape.
  • Use the semi-auto fire mode to kill zombies while full-auto fire mode for escaping.
  • Not recommended when combining with Deadly Shot due to low clip size, use it at dire situations or when the zombie is weak.
  • Aim for newly infected zombies as they are weak and easy to kill or soften them first and then use primary.

Comparison to Balrog-I (A Mode)



  • Higher damage (+6)
  • Higher fire rate (+2%)
  • Cheaper (-$300)
  • Higher Knockback to zombie


  • Same recoil (30%)
  • Same weight (0% speed reduction)
  • Has two firing modes


  • Less accurate (-1%)
  • Unable to shoot out explosive ammunition
  • Lower clip capacity (-3 rounds)

Comparison to Desert Eagle



  • Bullets can penetrates 4 objects
  • Higher fire rate (+3%) (A Mode)
  • Higher fire rate (+7%) (B Mode)
  • High knockback to zombie
  • Can be fired in full-auto mode
  • More accurate (+27%)


  • Same base damage in A mode (47)
  • Same recoil (30%)
  • Same weight (0% speed reduction)
  • Same magazine size (7/35)
  • Same reload time (2.2 seconds)


  • More expensive (+$550)
  • Less accurate (-25%)
  • Purchaseable by cash points and during special events only
  • Easy run dry

Comparison to Colt Anaconda

Icon anaconda cso


  • Higher damage (A mode)
  • Higher knockback
  • Higher rate of fire (+1%)
  • Lower recoil (B mode)


  • Both of them can be bought for permanent in cash points
  • Same magazine capacity (7/35)
  • Same recoil (A mode)
  • Same reload time (2.2 seconds)
  • Same weight (0% speed reduction)


  • Less accurate (-2%)



Firing sound

Skull1 reload

Reload sound

Skull1 draw

Draw sound

CS Online Videos - Skull-1(Taiwan Version)(03:48)
Are you owning this revolver now?

The poll was created at 05:38 on May 2, 2013, and so far 106 people voted.


  • Skull-1 is the second revolver that appears in the game. (The first one being Colt Anaconda)
  • The rapid firing mode is inspired from the original Glock 17 from Half-Life.
  • This weapon might be based on an unknown model of top-break revolvers or possibly the Russian-made MP412 Rex or the British-made Enfield revolvers.
  • Skull-1 will eject shells after firing every shot due to the game mechanism.
  • There are skulls painting on the gun's barrel.
  • This weapon has same quick draw as Anaconda but the hammer pull is different than Anaconda.
  • The secondary firing of the Skull-1 is similar to the cowboy-action shooting.

What do you think about Panic Room?

The poll was created at 00:32 on April 10, 2014, and so far 64 people voted.

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