Well there's this free 3D racing game, i forget the name but here's how it works, well you pick your car and race against bots (durp) but the cars can be damaged, you can win by either destroying all other cars or finishing in first place, there's a floating orange ring that you can jump through to fix your car, anyway for every race you win you move on to the next track and you usually unlock a car, a sequel has been made for this too