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This is a list of computer games that do not require any kind of formal "installation" onto a computer's permanent storage device to be executed, and can be stored on a removable storage such as a USB flash drive and used on multiple computers. See also portable applications.
Tremulous - As part of one of two races (either human or alien) the player works with their other team members to attack and destroy the other team along with their means to respawn in this 3D game.
War§ow - 3D game based on Qfusion with cartoon-like visuals and various player modes
XEvil - XEvil is a third person 2-D side scrolling game. The game is based on moving through randomly generated levels that force the player to attack enemies with one of several randomly chosen characters.
Marathon Trilogy - An early, doom-era shooter with sci-fi plot-driven storyline and online multiplayer and LAN support.