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40		Kurt's Spaced Invaders (DOS, 1995)
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40		Monuments of Mars (DOS, 1991)
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40		Great Glacier (Windows, 2004)
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Notes: Games similar to Descension, Games like Descension, Brain Dead, DigiPen, USA Corp., Windows, Action, Sci-Fi, Futuristic, Platform, Shooter, PC, Game Similarities.