Holy Savings, Batman! Green Man Gaming has a deal for Arkham Knight that makes more sense than a ball-point banana. Thanks to the coupon code BATMAN-ARKHAM-SAVE40, you can save a ton on either the standard or premium versions of Arkham Knight for the PC. Arkham Knight is shaping up to be one of the year's biggest releases, and getting the base game for $36 or the version with a season pass for $54 is an excellent deal.