Right now I'm installing Steam because a game called TrackMania Nations Forever is on there.

You can download it on the TrackMania website but I don't think you can play with Steam users if you did

For all those people that don't know what TM is: TrackMania (or TM for short) is a single and multiplayer game where you race on ready made or custom tracks (created via Track editor) depending by which TM you are playing, you have a selection of vehicles (no bikes, boats, planes or big rigs) to play around with (except for Nations which are indy cars coloured in a flag. eg. if you were born in Japan, your car would have the Japanese flag on it) you can get extension packs which add more things (like cars)

The track editor is easy to use and you can make the craziest track in about a minute, thats how easy it is

Best of all is that Nations is the only TM you can download for free

Soon there is going to be a TM for the Wii