See 3 new maps, Harvest, Shatter, and Wreckage for Halo 4 as well as a brand new game mode called Extraction which has you extracting assets from various sites around the map.
The Crimson Map Pack will be avaiable on December 10, 2012 for 800 MS Points.
Halo 4 Crimson Map Pack Trailer
on November 15th when your are playing Halo: Anniversary Edition your going to find yourself looking for “easter eggs” and or TERMINALS!!!! well in Halo: Anniversary Edition the terminals will be showing you parts of a story told by 343 guilty spark through out the game below is an example of what you can expect
find out more info at Halowaypoint