"Computer Chronicles" Sleeper Software (TV Episode 1991)
One of the guests plays the game as a demo.
Commander Keen 2: The Earth Explodes (Video Game 1990)
Commander Keen 3: Keen Must Die! (Video Game 1990)
Commander Keen in Keen Dreams (Video Game 1991)
'Goodbye, Galaxy!' Episode IV: Secret of the Oracle (Video Game 1991)
'Goodbye, Galaxy!' Episode V: The Armageddon Machine (Video Game 1991)
Duke Nukem (Video Game 1991)
Dr. Proton taunts Duke Nukem and further brags how Commander Keen cannot escape his mine.Wolfenstein 3D (Video Game 1992)
Putting a cheat code from episodes 4-6 and you'll get a message saying "Commander Keen is also available from Apogee but then, you already know that - right Cheatmeister?!"Strife (Video Game 1996)
One of the textures in Strife uses stylised Standard Galactic Alphabet lettering which reads DAMEX from top to bottom.Stargunner (Video Game 1996)
Billy is one of the names on the default high score list.Half-Life (Video Game 1998)
The Vortigaunts are a clear reference to the Vorticons of the Commander Keen series, both in name and premise, as they are a peaceful raced enslaved by a malevolent entity who are forced to act as enemies.
Wolfenstein 3D (Video Game 1992)
The Official Hint Manual for Wolfenstein 3D confirms that Commander Keen is the grandson of Wolfenstein's B.J. Blazkowicz.Commander Keen (Video Game 2001)
Doom II: Hell on Earth (Video Game 1994)
One of the secret levels in Doom II has Commander Keen hanging from a noose.Postal 4: No Regerts (Video Game 2022)
A parody poster of Commander Keen can be seen in the game.
Super Mario Bros. (Video Game 1985)
Commander Keen uses the same playing style as SMB.
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