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Incubation: Alien Apocalypse is a mod for Duke Nukem 3D: Atomic Edition. It was created by James Hollidge and Edward "Ed" Clarke and released on February 1st, 1999 (called Release 1). The mod was updated later (called Release 2) on February 3rd, 1999; this update fixed bugs in the East LA, Nuclear Age, and Suburbia levels, and included updated documentation. The final version of Incubation: Alien Apocalypse (called Version 2) was released on July 17th, 1999; two versions of this particular version exist, one without new music tracks (alien1n), and one with new music tracks (alien1e) (composed by James Hollidge and Edward Clarke). New art is also included.

To play the mod with a source port, such as EDuke32, double-click the the INCUBATN appilcation (it is a .bat file), then left-click and drag INGAME.CON into the source port's main .exe.


After Duke Nukem kills the Alien Queen, he rents an apartment in Los Angeles to rest. Some of the aliens survived being killed by him, however, and have come together to form a stronghold. It's up to Duke to kill the remaining aliens.


Episode 1: Incubation[]

  • East LA
  • Jailhouse Rock
  • A Fistful of Dollars
  • Nuclear Age
  • Cult of Evil
  • The Final Conflict
  • Suburbia
  • Time Warp (secret, accessible from Nuclear Age)

(Episodes 2, 3, and 4 are the same as those found in Duke Nukem 3D: Atomic Edition.)


Copyright (C) 1998-1999 James Hollidge and Edward Clarke.

Credits information source: "Incubatn" text file included with Incubation: Alien Apocalypse.