From now until October 14 you can get any Capcom game on Steam for 50 to 75% off. Holy crap. That's a great way to celebrate a 30th anniversary!
Super Street Fighter IV: Arcade Edition at $7.49, Lost Planet 3 (which just came out) is at $29.99, DmC is at $24.99, and man there's so many deals! Look at the Capcom Action Hits Bundle. It has these eight games for $59.99: Bionic Commando: Rearmed, Dead Rising 2: Off the Record, Dead Rising 2, Devil May Cry 4, Lost Plant 2, Resident Evil 6, Resident Evil 5, and Super Street Fighter IV: AE.
Go check out the full catalog, but be warned, you're not going to leave the page without spending money on something.