Epic Games has announced it is running a Gears of War 2 double XP event all weekend.

From September 4 through 8, Gears 2 players can earn double experience for all games, plus an experience bonus of 500 for the winning team in a Public competitive multiplayer match.

Additionally, in Horde, matches will default to Hardcore difficulty, with every tenth wave populated entirely by Sires.

Thanks to forum member Karlius for the tip.