This game is like Enemy Territory...it beats the **** out of similar games..and it's offered for free.

User Rating: 9.1 | TrackMania Nations: Electronic Sports World Cup PC
This is like the most competitive game i know to be playing with some of your friends or online. Knowing you can just squeeze another tenth off your friends laptime. It's really insanely fun.
Since i introduced it to my friends. No more:..hey cmon man, put on Fear, or CoD2...hehe...they all wanna play this . I truely haven't had as much fun in racing since mario kart on the snes.
One thing really bothers me tho, the music can't be disabled...and it sucks bigtime.

If you like this free version, try trackmania sunrise. It's really cheap (like 15$ or so) and it's even more fun than this one.