The $20 Gears of War 2: All Fronts Collection contains the Flashback, Combustible and Snowblind map packs, a poster, Live theme and strategy guide, plus Dark Corners.

The Dark Corners DLC--also available by itself on the Xbox Live Marketplace for 1600 MS Points ($20)--contains 7 new multiplayer maps and a 'deleted' campaign chapter where Marcus and Dom return to the Locust Hollow, playable with stealth or violence.

The Gears of War 2: All Fronts Collection and the Dark Corners DLC both arrive July 28.