Memorial Day Weekend is apparently a popular time for developers to implement double XP gains.andare doing it, and nowis joining the fray."Double XP foris now active for ALL platforms, worldwide! It'll stay active all weekend long and all-day Monday as well!" tweeted Infinity Ward's Robert Bowling.This and next week's double XP weekend are a celebration of the upcoming release of's second map pack, the Resurgence Pack . It's set to debut on Xbox 360 on June 3rd. When it hits the PS3 and PC (likely a month later), IW will probably hold another double XP event.