The military tried making super soldiers, but they made a mistake. Now the country is overrun with zombies instead. There are safe zones where people can stay, but the trick is to get there alive. Most cars have broken down or run out of gas, but your bus is still running. You're their last hope. In each level, crash into zombies that are lurking around an area where survivors are hiding. Once the area is clear, park on the indicated space so the survivors can climb into the bus. Then drive to the camp and park again so they can sleep easy in a fortified, zombie-free zone. As you beat each level, earn money to improve your bus.