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Doom (1993)
A 1993 first-person shooter by id Software pitting a space marine against demonic invaders on Mars's moons, defining the FPS genre.
You're looking for 1-syllable games containing O — here are 3 matches, each linked to a full profile.
List of 1-syllable Games that contain O
2
Pong
A 1972 two-dimensional table-tennis arcade game by Atari that became the first commercially successful video game and launched the gaming industry.
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Zork
A 1980 text adventure by Infocom set in the ruined Great Underground Empire, in which the player navigates dungeons by typing natural-language commands.
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