The game is about everything as you need to deliver some cargoes to your base, eliminate all the enemies on the road and even destroying anything that would stand in your way. All of these are done because you need to obey anything that the higher authority wants you to.
The game setting is in the moon so you can’t think of anything normal within the environment. Expect the most extreme terrain since you are not on earth. The task can be anything, but what is important in the game is that you do it right without crashing your vehicle.