best racing game on steam

I'd probably go with Burnout Paradise. Or Sonic All-Stars Transformed, if kart racing is more your thing.

Race Driver: GRID.
Go with the first one not the second. GRID 2 feels like downscaled compared to the first game, but still it's better than any Need for Speed in recent memmory. :)

For me it's Shift 2

Grid here. :)

Toca 3.

Oh, not available anymore. Well, something from SimBin, like Race07.

Grid, Burnout Paradise for arcade racer and Sonic Racing Transformed for your kart racer.

Project CARS.

F1 2012.

Grid 2 two minus things... in multiplayer voice chat is always on and almost all the players are assholes.

Dirt 2, Race 07, and (soon!) Project CARS.

Trackmania 2 or Sonic & All-Stars Racing Transformed
BTW Trackmania 1 Stadium is free is you want to try it.

GRID, Flatout UC, DIRT 2 and F1 Race Stars if you want "fun" racing game.

Sonic All-Stars Racing Transformed!!! Get it from steamtrades though so it's cheaper.

Ridge Racer

Pseudo Sims: Shift 2 Unleashed, GRID, Dirt 2/3
Arcadey: Trackmania 2, Sonic & All-Stars Racing Transformed, FlatOut 1 & 2, Burnout Paradise
Sim: Race 07 & all of it's expansions

GRID 1/2

GRID 1 , dirt 2, burnout paradise

trackmania for online/solo (more fun online though)

ridge racer for the average high speed street racer (online is based on challenges, beating records of other players) OR Burnout paradise

Fia GTR/GTR2 for driver simulator (though there was a free driver simulator on steam not long ago, could be better since its recent)

Sonic racing transformed for the fun racing style type of game

Stay away from GRID (crappy control, too hard) and stay away from Need for speed (obvious reasons)

Alternatively, you got Test driver unlimited 2 to try out and test drive: ferrari, i got no clue if these 2 are woorth it.

THE GRID SERIES

Burnout Paradise!

Like I said in the other thread:

Rally: Richard Burns' Rally. This is simply the best rally sim game, and the community released tons of mods that make it look like a brand new game.

Arcade: Burnout (personal preference for 3 and Paradise). Tons of fun to be had, many cars and bikes. The only thing I regret is the minimalistic multiplayer and the sync issues.

Timetrial: Trackmania. Get the first since it's free and there's pretty much no difference with the others.

Sim: I don't know. I just downloaded RaceRoom Racing Experience which is a F2P on Steam since it was recommended to me but didn't try it yet. I tried Grid a while back but ragequitted after a few hours because the AI was such a pain in the arse. I keep hearing about Project Cars, but it costs quite a bit and you need very high specs in order to run it smoothly.

Dirt2 :D

Sonic racing transformed

i love dirt xD its the best