Commander Keen: Aliens Ate My Babysitter! is the final episode of the famous series of side-scrolling platformers created by id Software. The game, published in 1991 by FormGen, was infact the 7th game, since Commander Keen: Keen Dreams is outside the main story. During the creation of Aliens Ate My Babysitter, id Software began work on Wolfenstein 3D, and its success stopped any further development on the platformer series.
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