Fable 3 DLC "Traitor's Keep" is coming to the Xbox Live Marketplace on March 1. The add-on pack will cost 560 MS points. Traitor's Keep lets gamers continue their adventures in Albion. The pack will feature three new levels: Ravenscar Keep, Clockwork Island, and the Godwin Estate. Along with additional content, gamers will be getting what they really want: More achievements.