Martians have landed on earth and it seems like they don't want to be friendly! Take your gun, comb your mustache and let's start shooting bullets! Hey Cowboy, can you kill them all? Play Cowboy VS Martians online at friv2010.com. You can play it in fullscreen to have fun with it. Cowboy VS Martians is a great Friv 2010 game to play with no cost.

Use Left Mouse button to Shoot, Use Move Mouse button to Aim,

shooting, gun..