GTA: Earn to Die
The zombie apocalypse has force you to leave in the desert. Life is hard because resources are scarce. After months of living in the desert, you found your hope as there is a helicopter nearby. However, it is guarded with the undead. The idea of the game is to get to the helicopter, but that is the long time goal. In the meantime, you can settle with the short term goal of upgrading and buying better vehicle. You earn money based on the distance that you traveled. You can also earn money from the epic kills of zombies.