GTA: Dead Paradise
You were just a regular employee and each day, you need to go to your work, but little did you know that things are about to change that day. There was a huge explosion, ten years after, everything is a wasteland, but you know that you need to go on with your life. Your life surely has change now, but you need to fight to live. The idea here is to get to the safe zone, but that won't be easy since there would be lots of marauders everywhere and you need to fight them. Each kill would earn you money and you can use the money to buy some upgrades.