Unfortunately, you can't. C.A.T.S. is an asynchronous multiplayer game. You play against the machines created by real players. Even though your opponents don't have to be online at the time of the battle, the game constantly checks the state of their cars, and if an opponent's car has changed, it can affect the outcome of the battle. That's why you need to be connected to the Internet at all times.
Can I play C.A.T.S. offline?
Last Updated: 501d