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 mods and funEnjoy Play Martian Zombie Survival online at friv20000.com. You can play it in fullscreen to have fun with it. Martian Zombie Survival is a great Friv 20000 game to play with no cost.

Use Left Mouse button to Play

shooting, multiplayer, shooter, unity3d, webgl, gun, strategy, fps..