Grand Theft Auto, Multi Theft Auto is a modification for Grand Theft Auto: San Andreas for PC that allows you to play it online against players around the world.
Driving Speed 2, lay against your friends over a LAN or Internet with 8 player multiplayer...Crazy Kart, Crazy Kart is the ultimate online racing game published by none other than Zapak.
Trackmania Nations ESWC, This completely free version of the arcade racing game gets rid of the classic settings such as the desert and city and places the entire action within the Trackmania stadium.
Speed Racer,Speed Racer is a completely free, simple but great fun top-down racing game for one to three players, which doesn't take itself too seriously.
GT Racing, GT Racing 2002 is an incredibly sophisticated modification for EA's F1 2002. It features new cars, new sounds, new tracks, and pretty much new everything.