s1. Commander Keen: Invation of the Vorticons Trilogy s2. Commander Keen: Keen Dreams (1991) s3. Commander Keen: Goodbye Galaxy Set s4. Commander Keen (1991) s5. Commander Keen (GBC) s6. Rescue Rover (1991) s7. Rescue Rover II (1991) s8. Dangerous Dave in the Haunted Mansion (1991) s9. Hovertank 3D (1991) s10. Catacombs 3D (1991) s11. Heretic (1994) s12. Hexen (1995) s13. Hexen2 (1997)			486/33 or higher. MS-DOS 5.0 or higher. 25MB of available Hard Disk Space. 8MB of RAM. VGA graphics. Supports joystick and mouse. Supports Sound Blaster and 100% compatible sound cards