What was that game for Linux that has motorcycles, where you have to crash the opponents vehicle?

I saw my friend running Ubuntu a few years ago and he was playing a 3D game that was set in a virtual world. He was driving a motorcycle type vehicle around that would leave a trail behind it. He would then try to get the opponents motorcycle's to crash into his trail while avoid their trails. I was wonder what the name of this game was? And if anyone knows what it is, what is the website for it?|||It's called Armagetron, it's based off the movie Tron.