Abandonware DOS title

The most popular co-op games

Co-op (which stands for co-operative) multiplayer mode allow more than one player to play together to achieve common goals.
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Toobin

DOS1989 Domark Software
Toobin is an abandoned action game developed by Domark Software and released in 1989. Toobin runs on DOS but was also published for Amiga, Amstrad CPC, Atari ST, Commodore 64, Game Boy Color, MSX, NES, ZX Spectrum. It's a conversion from a popular arcade game (at the time).
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CHAMP Centipede

DOS1993remake ChamProgramming corp.
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Bubble Pop

DOS1997 Software of Sweden
Bubble Pop by Software of Sweden is a platform game that follows the classic bubble-popping mechanics similar to other popular games in the genre (Bubble Bobble...). Bubble Pop was published in 1997 by Webfoot Technologies for DOS only.
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Demon Stalkers

DOS1989 Micro Forté
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Wing Commander: Armada

DOS1994protected Origin Systems
Wing Commander: Armada is space combat simulation game developed by Origin Systems and released by Electronic Arts in 1994 for DOS. Wing Commander: Armada is part of the Wing Commander game series and was published before Wind Commander III. Armada is focused on multiplayer battles but it can be played in single player mode too. It features differe...
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Monday Night Football

DOS1989 Park Place Productions