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? Cowboy,Martians,Space Western,Sci-Fi Western,Alien Invasion,Wild West,Space Adventure,Action,Comedy,Adventure,Bullets,Explosions,Cowboy Story,Intergalactic Battle,Space Battle,Funny Story,Western Adventure,Extraterrestrial,Martian Invasion,Space Cowboy,Gunfight,Hero,Save the Earth