October 12th through October 28th will be 4 XP on Gears Of War 2. Then from October 29th until November 1st will be 31 xp!
The reason for the XP fest is Gears 2 hits Games On Demand on XBL on October 12th.
From the 29th through the 1st of November is also capped by Chainsaw massacre Horde mode event!