The second map pack for the hit first person shooter Call of Duty Black Ops has finally been officially announced via the Major Nelson web site. The DLC map pack is titled Escalation and will once again feature four new multiplayer maps along with a new zombie-themed map.

The maps include Hotel, set in a "Cuban luxury hotel and casino", Convoy set during a "ambushed US military convoy", Zoo, which takes place in an "abandoned Soviet Russian Zoo," and Stockpile, set in a small Russian town "housing secret WMD facilities." The new zombie map doesn't have a name yet but we are promised a unique map with "all-new playable characters."

The map pack will be released on May 3 for the Xbox 360; the PC version will likely be released sometime in June.