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After completing the mission in episode one, Keen learns of the Shikadi's enormous ship, which doubles as the largest weapon ever built. So in episode two, titled "The Armageddon Machine", Keen faces his greatest challenge yet - to save the Galaxy!
Also known as: Commander Keen 5: The Armageddon Machine
Commander Keen in Goodbye, Galaxy!: The Armageddon Machine was released on December 18, 1991.
Commander Keen in Goodbye, Galaxy!: The Armageddon Machine is available on DOS.
No — Commander Keen in Goodbye, Galaxy!: The Armageddon Machine is a single-player game.
Commander Keen in Goodbye, Galaxy!: The Armageddon Machine was developed by id Software and published by Apogee Software.