Commander Keen: Invasion of the Vorticons:
Episode 1: Marooned on Mars (Dec. 14th 1990)
Episode 2: The Earth Explodes (1991)
Episode 3: Keen Must Die! (1991)
Commander Keen in Goodbye Galaxy!:
Episode 4: Secret of the Oracle (1991)
Episode 5: The Armageddon Machine (1991)
