This is one of the most popular free online multiplayer game. Recently i stated playing it but i was not impressed. Since ive played games like Urban Terror, Counter Strike, i found this game lacking clearity only one thing i like the most in this game was the speed and anticamping which wont allow you to camp, the maps are small as compared to UT4 and CS. And small screen makes the play more difficult.

This small game just takes 200 MB of your computer you can download it from download.cnet.com

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Some screenshots of the game