Do you have a PS3? Do you have an active PS+ membership? Do you like freebies? GRID 2 for the PS3 was just released this afternoon as a PS+ freebie.
I've had a PS+ membership for two years now, and I've gotten a ton of great free and cheap games, but I've never noticed any free driving games. Now, I'm not all that into arcade racers, but this one looked interesting to me when it was released in May this year. I'll be playing Battlefield 4's China Rising DLC until Friday when Gran Turismo 6 comes out, but I downloaded GRID 2 anyway. You might want to, too.