I'm thinking they have a home planet but they did something on it so the natural resources are depleting so they have to invade other planets and steal their resources.
Question, you said to find the alive creature human whatever, but you also said in the first paragraph to shoot the last one standing. So how do we find the alive guy if you shoot him?
Edit: you might want to change the name of the screen so it doesn't give away what to find.
edit: grr...
I actually made a racing map. rr_racetrack.zip
It supports 20 racers (20 buggies). Sorry for fullbright. Rad was freezing my computer so I wasn't able to get it to work even after last update. There is a camera for someone to be the cameraman, also a large tv. The textures are simple...