Humble Sid Meier Bundle: Civ 3, 4 and 5, plus Ace Patrol, Railroads

Humble Bundle offers three tiers of entry into Sid Meier's epic, world-building simulation games: The first package offers Civilization 3 Complete, Civilization 4: The Complete Edition, Ace Patrol, Ace Patrol: Pacific Skies and Railroads for any price you want. The second tier adds Civilization 5 and its Gods and Kings DLC if you pay more than the average, and the third tier packs in Civ 5's Brave New World DLC for $15 or more.

The Humble Sid Meier Bundle is live for two weeks and benefits the charity Action Against Hunger, a humanitarian organization with the goal of ending world hunger. As always, spend more than $1 to get Steam keys with your Humble Sid Meier Bundle order, and split whatever you pay among Humble, the developer and the charity.