Just note, if you are a Windows user, look for titles with Steam in their description. Games on sale include 2K titles like the Bioshocks and Borderlands and Civilizations, some Star Wars games, Doom 3 ($2.50), Quake 4, Simcity 4 ($5). Rage and The Sims 2 Collexion seem to be mac only.
Use Topcashback for an extra 5% off (it is similar to Cash Rewards).
Prices are in USD
This is actually pretty good. Thanks OP.
Just a heads up that the DLC items aren't compatible with the Mac AppStore version of these games only the Steam version.