Anyone who played multiplayer in Halo 4 before Nov. 20 is now getting access to six class-based specializations previously available only to those who purchased the game's Limited Edition. Emails with download codes went out Friday evening, according to tipsters.
"Specialization Priority Alpha," is the codename for the DLC package unlocking the modes. You earned it if you played Halo 4 multiplayer sometime before Nov. 20. Specializations offer additional armors and abilities and another 10 ranks. They become available once you reach level 50 in multiplayer.
If you missed the Nov. 20 window, the "wetworks" and "pioneer" specializations are still unlockable after level 50, but not the rest. For now.