'Fenix Rising' will feature five new multiplayer maps for Versus, Horde and Beast modes, new multiplayer skins and the option to 're-up' at level 100 online.
Maps included will be based on locales from the single player campaign, such as Academy, Anvil, Depths, Escalation and The Slab.
The DLC will also provide access to the 'Recruit Clayton' and 'Thrashball Cole' skins when playing as a COG and the 'Savage Marauder' and 'Savage Kantus' skins when playing as Locust in multiplayer.
Players who reach level 100 will have the option to 're-up', which resets their experience and rank while keeping all other progress intact. This can be done up to three times, with exclusive rank icons and weapon skins unlocked with each 're-up'.
'Fenix Rising' is the third DLC for Gears of War 3, following the 'Horde Command Pack' and 'RAAM's Shadow'.
'Fenix Rising will be available to download on January 17, 2012 for 800 Microsoft Points (£6.80 / $10).
It is also being offered as part of the Gears of War season pass, which entitles fans to four pieces of DLC for 2400 Microsoft Points (£20.40 / $30).
Gears of War 3 is available exclusively on Xbox 360.
> Digital Spy reviews 'Gears of War 3'
View an image gallery of the 'Fenix Rising' map pack below: