All donations/purchases to the Action Against Hunger charity.
By donating $1 or above gets you Civilisation III Complete Collection, Civilisation IV Complete Collection, as well as Sid Meier’s Ace Patrol and its expansion, and Sid Meier’s Railroads!
If you donate more than the $7.48 average (come on, guys), you get access to Civilisation V and its expansion pack, Gods + Kings DLC. If you donate more than $15, you get the other Civ V DLC pack, Brave New World.
2K would sell all these games separately on Steam for $140, so $15 and above is pretty great value. Give more if you can!
The highest donation so far is $1234.56. Nice one, kind stranger! [Humble Bundle]