Just about a week ago, Crytek released a trailer
for the upcoming DLC pack for http://www.trueachievements.com/Crysis2-xbox-360.htm
Today, that map pack has been released. Featuring four new maps; 'Park Avenue', 'Transit', 'Shipyard' and 'Compound', the "Retaliation" DLC pack can be picked up right here
for 800 MSP.
The new maps may breathe more life into multiplayer, but they do not add achievements, so consider your purchase carefully.