A walled dirt arena and a pack of old cars: ram the others until their engines quit and keep your own running. The engine sits in the nose, so T-bone them, back into them with your boot and dodge the head-ons. Hide too long and the judges dock your engine; grab the repair kit when it smokes. Last car moving wins the heat, and every heat brings more, tougher cars. Free, no sign-up — play right in your browser.