Sanctum: X-Mas Carnage DLC free on Steam (reqs base game) By w00py | December 16, 2011 0 Comment Vincent passed this game deal along (Thanks!). Currently on Steam, you can get a free Christmas themed DLC for Sanctum called Sanctum: X-Mas Carnage. Vanilla Sanctum is required. Sanctum: X-Mas Carnage (Free DLC) = $0.00