you are an astronot for NASA,you have been sent to Mercery to get a rock sample to bring back to earth. then your ship malfunctions. (You are asleep at the moment)You wake up hearing:Beeep! Beeep! Beeep! followd by:CRACK. You get tossed out of bed fall down the shoot and land on the floor very confused. you put on your spacesuit then hop outside,you see something strange in one of the craters. You go check it out,you find some sort of alein lifeform but you also see a base, it must be from NASA!Well lets kill this alein and move on.P.S I know how to use the backwalls but it would make to much lag.