I found this game on a gaming site a few days ago. It's a free survival racing game. Very Tron inspired, you drive a futuristic car on crazy tracks and the goal is to reach the end. No multiplayer, no other cars, very simple. But I've played through the 6 normal and 7 hardcore levels and they are a blast. The hardcore levels will require a few tries
Here's the link:
http://nitronic-rush.com/(The torrent works great)