Just in time for your Turkey Day weekend, Killzone 2 will be activating double XP on all multiplayer games from November 27th to November 30th. In addition to double XP, Guerrilla will host a Killzone 2 "retro tournament" using only the Beach Head and Southern Hills maps from the second DLC pack, both remakes of Killzone 1 maps. If you don't have the DLC yet and don't want to drop "money" on it you'll want to check out Killzone.com -- free codes will be given away later this week.