The newest Crusader Kings II DLC pack has a 20% off coupon code
If you always wanted an in depth game of Risk in a historic medieval setting, then Crusader Kings II is right up your alley. The hardcore strategy PC game got a brand new DLC expansion pack: The Old Gods. This new DLC focuses on a pagan medieval empire building, with an earlier start date from the original game (867AD vs. the traditional 1066AD start date).
The DLC pack released for $14.99 on Steam, but you can grab it at a $3 discount after coupon at Green Man Gaming.