Duke Nukem Wiki
Not to be confused with the Duke Nukem 3D level of the same name.

Critical Mass is a total conversion for Duke Nukem 3D: Atomic Edition. It was created by Bocao (Vitor de Paulo) and released on January 17th, 2003. It contains new levels, weapons, enemies, sound effects, and a new boss.


Aliens are controlling a nuclear research facility. A teleporter must be used to gain entry into the facility, and the only escape is via turboplane at a hangar.


  • Might Boot
  • Pistol
  • Shotgun
  • Chaingun Cannon
  • Rail Gun (uses the Rail Gun sprite from Quake II, RPG replacement)
  • Pipe bomb
  • BFG 9000 (uses the BFG 9000 sprite from Doom, Shrinker replacement)
  • Dual Pistols (function similarly to the Dual Uzi from Shadow Warrior, Microwave Expander replacement)
  • Laser Tripbomb
  • Detonator (uses a new sprite, replacement for Freezethrower)

(The Devastator has been removed.)


  • Assault Trooper
  • Assault Captain
  • Super Trooper (wears a blue vest, armed with a grenade launcher and a rail gun)
  • Pig Cop
  • New Assault Commander (uses a rail gun)
  • Storm Tank (Pig Cop Tank with rail guns, grenades, and a BFG 9000)
  • NME (Sentry Drone with a laser scanning system, uses a Detonator)
  • The Boss (fought in the "Hangar" level, Cycloid Emperor with a Detonator, can teleport and turn partially invisible)


Episode 1: Critical Mass[]

  • 9th Floor
  • Critical Mass
  • Hangar

(Episodes 2, 3, and 4 are the same as those in Duke Nukem 3D: Atomic Edition. Episode 5, The Birth 2, contains no new levels and kicks the player back to the main menu.)