This category lists all the pages related to the music in the Commander Keen series. Since only the second trilogy and the Game Boy Color game had music, the pages are focused on Keens 4-6 and GBC.
The entire Commander Keen official music collection (covering Keens 4, 5, 6, and GBC in IMF, MIDI, and GBS - everything except fan songs and remixes) can be downloaded here:
keenmusic-r3.zip (228 kB)
The complete soundtrack from Commander Keen for the Game Boy Color in WAVE format can be downloaded here:
Commander Keen GBC Music.zip (333 MB)