You are the only survivor of a zombie apocalypse in a futuristic city. You are free to explore and fight against other robots and zombies to survive. You have a variety of weapons, including assault rifles and machine guns. It is up to you to shoot down the zombies and protect the civilians.

Zombies have a high attack rate and can quickly overwhelm you. You need to be quick and careful in killing them. You can upgrade your weapons with gold and experience points.

You can buy upgrades, including ammunition, flashbullets, and bullets. These can be used to upgrade your weapons. You can also buy shields to protect yourself from zombie attacks.