First Series: Invasion of the Vorticons

• Keen #1 - Marooned on Mars
• Keen #2 - The Earth Explodes
• Keen #3 - Keen Must Die

Second Series: Goodbye Galaxy

• Keen #4 - Secret of the Oracle
• Keen #5 - The Armageddon Machine

Special Edition Series:

• Keen #6 - Aliens ate my Babysitter!

Lost Game Collection of id Software Series from Gamer's Edge:

• Keen Dreams

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