Activision has launched the next Call of Duty: map pack on Live today.

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Escalation features four new maps for the main mode as well as another additional level for Treyarch's trademark zombie mode.

This time round the levels include Hotel, a battle on the rooftop of a Cuban luxury hotel, Convoy, a close quarters level at the scene of an ambushed convoy, Zoo, an abandoned Russian zoo and Stockpile, a remote Russian town hiding a stockpile of WMD. The zombie level is called Call of the Dead features an array of cult celebrities including George A Romero and brings the zombie to the frozen isles of Siberia.

Treyarch boss, Mark Lamia said: "We took the community's feedback to heart, and the result is five of the most creative and varied maps we have ever made. 'Call of the Dead' is an homage to the great horror films that have inspired the team and represents a deep commitment to our Zombie fans. Being able to collaborate with such talented artists and musicians was an absolute honour and thrill for everyone involved. We think the fans are going to go crazy over it."

By Ewan Aiton