Today sees the release of the of the 2nd Call of Duty Black Ops map pack which is named Escalation on the Xbox 360.

Escalation features 5 new maps, 4 of which are for online multiplayer and 1 of which is a new zombie map.

The 4 multiplayer maps are called: Hotel, Convoy, Zoo and Stockpile. Each of the maps have their own unique usage with Zoo having a monorail track players can exploit and stockpile having house with a working garage door etc.

The zombie map is known as Call of the Dead and it has 4 character fighting you guessed it waves after waves of zombies.

Here is a promotional poster for the zombie map Call of the Dead.

You can buy the map pack for Xbox 360 now for 1,200 microsoft points and you will be able to buy it for the PC and PS3 versions at a later date.