I Upgrade Everything in the World in the Last Days

The world of warriors at the end of the world. In the game, Fat Man travels through the apocalypse to become a good-for-nothing young master, awakening to the upgrade system. Start by upgrading your sniper rifle, body, and awakening skills. In the later stage, the system will be upgraded and the system will become stronger as it is upgraded. The stronger the body, the stronger the protagonist, and the cycle is endless.