Now you can get your off-road racing fix for even cheaper! DiRT 2 is on sale this week. Take note that as it is a Live Enabled game, it does indeed carry achievements.

DiRT 2 (PC) - $39.99/£34.99 $19.99/£17.49
Codemasters' Racing Studio brings you DiRT 2: off-road racing, now with attitude. DiRT 2 combines the excitement and aggression of off-road racing with the style and flair of extreme sports. Tour the world, racing against real-life off-road superstars in eight varied disciplines on tracks ranging from Malaysian jungle sprints to roaring stadium runs in L.A. Head online for completely customisable 8-player racing across all the game's tracks and race types.
Head here to download the game.