Sonic the Hedgehog CD (Aug 1, 1993 prototype)

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Play retro game NBA Jam on your browser free NBA Jam, featuring two-on-two basketball, was one of the first truly playable basketball arcade games and also one of the first sports games to feature teams and players. licensed by the NBA as well as their actual digital representations.

In Cuphead, run-and-gun levels are interspersed with boss battles. In one of the four worlds, each faces the Devil in their final conflict.

Mortal Kombat is a 2D fighting game. Arcade cabinet versions of the first two use a joystick and five buttons: high punch, low punch, high kick, low kick, and block; Mortal Kombat 3 and its updates added a Friday "run" button.

Terraria is an action-adventure sandbox game developed by Re-Logic. The game was first released for Windows on May 16, 2011, and has since been ported to a number of other platforms. In a procedurally generated 2D world, the player can explore, craft, build, paint, and fight with different creatures. 

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Splatoon 3 is another third-person shooter. Splatoon 3 adds primary and special weapons: Inklings and Octolings. Both shoot ink.

Play retro game Sonic the Hedgehog CD (Dec 4, 1992 prototype) on your browser free

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Uno Online is a popular game that can be played for free in a web browser. The aim of the game is to be the first player to have no cards, similar to other Crazy Eights style card games. Play Uno in multiplayer mode with 2, 3 or 4 players.