The two new maps featured are Firebase Condor and Firebase Hydra. Condor will offer the landscape of one of Palaven's moons, protecting the Turian homeworld from the Reaper invasion. Hydra will take place in an abandoned Quarian colony which has since been converted into a human power plant facility.
Three new weapons will also be included - the Striker Assault Rifle, Geth Plasma SMG and Batarian Kishock Harpoon Gun.
Mass Effect 3 recently came under fire due to controversy surrounding the game's ending. BioWare has announced that it will release a free Extended Cut DLC pack to "clarify" the ending with additional cinematic sequences this summer.
The 'Resurgence Pack' will be available as a free download for all Mass Effect 3 owners.
It will be available on PC, Xbox 360 and North American PlayStation 3 on April 10. A European PlayStation 3 release will follow on April 11.