The land is desert and mountainous terrain. Water is scarce! The oceans have all but dried up and what is left is at the poles and has salinity levels too high for desalination. Water has become currency stored in one ounce vials worth more that any paper money ever was. There is water left, but it is hidden and heavily guarded.
The goal is to make alliances, traverse the desert, and get enough water to buy your way off-world.