It’s not peacefully in Iran again. All criminal and opposition groups activated after an earthquake in Tehran.There is a bloody struggle for oneself life at the epicenter of disaster.

In the DLC Battlefield 3: Aftermath you'll see such innovations:

• 4 new maps, focused on fighting in city style.
  
• Landscape and buildings,destructed by earthquake, can become an excellent shelter or fire point
  
• Vehicles modified for "city" fighting
  
• An additional gameplay mode
  
• New tasks and achievements