Aspyr Media via iTunes App Store cuts up to 60% off select downloadable Mac games, with prices starting at $9.99. They're at least $10 off and at the lowest prices we could find, although we've seen some for less in the past. The deals:

• Duke Nukem Forever for Mac for $9.99 ($10 off)
• Call of Duty 4: Modern Warfare for Mac (pictured) for $19.99 ($20 off)
• Civilization V: Campaign Edition for Mac for $29.99 ($20 off)