Following the Invasion of the Vorticons, the story arc of Goodbye Galaxy! takes Commander Keen to a planet to rescue the Keepers of the Secret of the Oracle, which know the location of the Shikadi's doomsday device, The Armageddon Machine.

Following the Invasion of the Vorticons, the story arc of Goodbye Galaxy! takes Commander Keen to a planet to rescue the Keepers of the Secret of the Oracle, which know the location of the Shikadi's doomsday device, The Armageddon Machine.