If want to play as zombie and fight agains and interstelar alien then try Martian Zombie Survival in the great fps sci fi with option to play in 2 mods and fun. Enjoy!
*WASD* - move *down*, *up*, *left*, *right* or *arrows* - move *mouse* - look around *space* - jump *shift* - run *0*..*9* - change guns
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