Today, Microsoft and Epic Games announced RAAM’s Shadow, the new campaign Gears of War 3. Starring a cast of both new and old characters, RAAM’s Shadow will deliver more than three hours of gameplay set in a storyline that precedes the events of the first Gears of War, as well as six new multiplayer characters, the Chocolate Weapon Set and an additional 250 Gamerscore. RAAM’s Shadow will launch Dec. 13 for 1,200 Microsoft Points on Xbox LIVE Marketplace, marking the second major game add-on for Gears of War 3.

RAAM’s Shadow drops players into the events of Sera post-Emergence Day, as Zeta Squad is enlisted to evacuate Ilima City and protect the citizens against a Locust Kryll storm. Taking on the infamous Locust leader from Gears 1, General RAAM, Zeta is led by Michael Barrick (from Gears of War comics fame) and comprised of familiar faces such as Lt. Minh Young Kim (Gears 1) and Tai Kaliso (Gears 2), and also includes a new female comrade, Alicia Valera.

In addition to fighting as a new squad of Gears, players will step into the boots of RAAM himself, and for the first time storm the human stronghold from the perspective of one of the series’ most legendary bosses.

Look for the DLC add-on in November.