Galactic Alien Marsis a smashing 3d shooting game. There will be an alien war. The battle will take place on ten maps, with three modes. Choose to be a soldier or an alien, then enter the arena and earn points for your team. WASD to Move. 1 2 to Change Weapons. R to Reload. C to Crouch. Ctrl to Prone. Shift to Run. Space to Jump. T to Chat. P to Fullscreen.