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
Skate
Squid
Wheel
Fire
Flyin
Teen
Face
Dude
Dodge
Footb
Rescu
99 Ba
Rider
Spide
Skibi
Hallo
Impos
Numbe
Wipe
Class
Canon
Kill
Skibi
Drunk
Icy D
Pirat
The C
Line
Fall
Dr Pa
Ginge
Carro
Tangl