Call of Duty: World at War Double XP Weekend Good news for all you Call of Duty: World at War fans out there. This weekend, January 30th through February 1st, you'll be able to earn double XP while playing online. In addition to double XP, you will have two new playlists at your disposal. Team Tactical (4v4) and Mercenary TDM (no parties allowed)! Team Tactical will pit two teams of four against each other in a random rotation of all the Team-Based gametypes. Anyone excited?