1989-91 MS-DOS computer game series. Created by John Carmack and ID software. Played today in the DosBox emulator. Reached its apotheosis with NETKEEN. [[File:Keen_thumbs_basic.jpeg|360px|thumb|right|Commander Keen]
List of official Commander Keen games
Invasion of the Vorticons
- Commander Keen 1: Marooned on Mars
- Commander Keen 2: The Earth Explodes
- Commander Keen 3: Keen Must Die!
- Commander Keen: Keen Dreams
Goodbye Galaxy
List of unofficial versions
- Lego keen
- Commander Keen 7 The Keys of Krodacia
- Commander Keen 8 Dead in the Desert
- Commander Keen 9 Battle of the Brains
- Commander Keen 9.5 The Eight Accumulators
- Commander Keen 10 Mirror Menace
- Short Circuit Oracle
- Terror from Outer Space
- NETKEEN
Unofficial Levelpacks from BadBloog
- Levelpack BB1 for Keen1