Alien Exterminator is a 3D first person shooter game. You are an alien exterminator and you have been sent to a space station that is infested with aliens. You must kill as many aliens as you can and survive. Use the medkits to help you along the way. Use your arrow keys and mouse to move your left mouse button to fire and your right mouse button to jump. Good Luck! Alien Exterminator is now compatible with Windows Vista and is still completely free. Visit http:www.OTSsoftware.com for more free games.