Fuel: A simple, but massive open world for racing. I believe it actually made it into the Guinness book of world records, with the largest amount of space to explore. I was going to type a summary of the game, however the website said it best. "In an alternate present, vast stretches of America have become no-go areas as the devastating effects of global warming ravage the continent. Floods, storms, brush fires, tornadoes and hurricanes have driven people from towns and cities into safe zones as extreme weather wreaks havoc, creating thousands of square miles of dangerous uninhabitable areas. People turn to renewable energy in the face of the destruction caused by this catastrophe. But these danger zones have also become a playground for a new breed of racer. With a stockpile of fuel to be burned, adrenaline junkies head into the wilderness to compete against each other in spectacular races against themselves and the elements.
" Multiplayer is only for freeroam I believe, however since the game came out in 2009, I don't believe anyone plays multiplayer anymore. I mainly enjoy it for the free roam, the races aren't that well created in my opinion. There is a campaign mode, and you have to unlock the other areas, but you can drive to any unlocked areas at any time.
Amazon link: http://www.amazon.com/Fuel-PC/dp/B001OA ... =fuel+game
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BeamNG: This is currently in alpha, and you can try the 'tech demo' for free, or donate $15 to get early access. http://www.beamng.com/
" onclick="window.open(this.href);return false; At the moment, its just a really good car physics game, the best i've ever seen so far, although they are developing it into a full feature game I believe.
These are my two favorite racing games. And the pictures were to big, so I just put the link there.