DiRT 3 Complete Edition. Now that they moved it over to Steamworks I've been playing it a bunch the past couple days and it's so good. The controls are so smooth, and even on my cruddy computer the graphics and effects look good and are mostly lag free. I haven't tried the multiplayer yet, so I can't vouch for how well it works now that GFWL is gone.
I also picked up Injustice: GAU Ultimate Edition while it was on sale on the Humble Store, but it's going to take 29 hours to download because my internet is so slow >.> so i'll report back once ive played it.
Steam: bE.(Insert witty name) Origin: TDog9631 Battle.net:TDog9631#1737