Tomorrow Mass Effect 3 gets another free expansion of its multiplayer called Rebellion Pack on PC and Xbox Live (one day later on PSN). It's a free download and adds two new maps to the Galaxy at War co-operative experience. There will also be a new objective, and an added equipment slot.
The new DLC also adds new characters, including Vorcha warriors, former Cerberus operatives, and male Quarians. New weapons and items are also included, and you will be able to get them through boosters in the in-game shop.