If you're still hankering for summertime sales and you didn't exhaust your wallet on Steam, Gamefly has a killer batch of Rockstar Games offers through their download service.
Easily the best option in this Tommy-Vercetti-esque price-slashing spree is all of Grand Theft Auto IV and all three PS2-era GTA games for just $10. That's right, you'll get GTA IV, Episodes from Liberty City, San Andreas, Vice City, and GTA III for just $10 when you use the coupon code GFDJUL20 on Gamefly's site.
They've also got Max Payne 3 Complete, Max Payne 1 and 2 for just $16 with the same coupon code, not to mention deals on L.A. Noire, Bully: Scholarship Edition and more. These are all for PC and all of the games unlock via code on Steam.