Activision and Treyarch have had no problems reenlisting gamers to take part in online skirmishing for Call of Duty: World at War, which sold 11 million units globally during its first seven months. World at War's Map Pack 1 and Map Pack 2 multiplayer add-ons both went platinum during their debut weekends on Xbox Live and the PlayStation Network, with the first extension having subsequently achieved sales of 2 million units.

Today, Activision announced the third Map Pack for its top-selling World War II shooter will be available for the Xbox 360 and PlayStation 3 in August. And as with the first two multiplayer add-ons, Map Pack 3 will offer three new competitive arenas as well as one zombie-themed match. Activision did not reveal pricing information, though the previous two packs are available for $10 (MSP 800).

In the upcoming map Revolution, soldiers fight in Russia's cold city streets and factories amid treacherous sniper fire. The map Battery features a fortified island encircled by anti-ship mines and cannons. The urban-themed Breach puts players in the dismal byways of Berlin, near the historic Brandenburg Gate. Der Riese (Zombie Factory) will feature a Nazi research facility, a machine that can upgrade weapons, and 10 new achievements or trophies.