Enemies and Items
Commander Keen: Invasion of the
Vorticons!
Commander Keen 1: Marooned on Mars
Commander Keen 2: The Earth
Explodes
Commander Keen 3: Keen Must Die!
Commander Keen: The Lost Episode
Commander Keen 3.5: Keen Dreams
Commander Keen: Goodbye, Galaxy!
Commander Keen 4: Secret of the
Oracle
Commander Keen 5: The Armageddon
Machine
Commander Keen: Special Edition
Commander Keen 6: Aliens Ate My Baby Sitter
Commander Keen: Game Boy Color
Commander Keen: Game Boy Color