Green Man Gaming offers Steam downloads of Cities: Skylines for Windows, Mac, and Linux for $21.89. (You'll need to log in to see this page; it should be the first option.) That's the lowest price we could find for this newly-launched city-simulation game by $8.
Amazon takes 40% to 50% off a selection of Blizzard games for Windows and Mac, as listed below. Plus, Prime members bag free shipping on all items. (Non-members can spend $35 or more to qualify for free shipping.) The deals:
Amazon offers Steam downloads of the Civilization Complete Pack for Windows, Mac, and Linux for $16.99. That's the lowest price we could find by $51. It includes Sid Meier's Civilization V: Complete Edition for Windows, Mac, and Linux; Civilization IV: Complete Edition for Windows and Mac; and Civilization III: Complete Edition for Windows.