"Escalation", the second Call of Duty: Black Ops map pack, contains 5 all-new exceptionally varied maps; featuring 4 Multiplayer maps and an epic Black Ops Zombies experience with all-new playable characters.
The Escalation Content Pack will be available first on Xbox Live on May 3, 2011.
Video
http://youtu.be/aQ1QRmRCDvg?hd=1