In Spring 2015, a remake of Halo 3: ODST will be added to Halo: The Master Chief Collection at no additional charge. The remake updates the Xbox 360 game to run at 1080p resolution and 60fps. However, it's limited to the single-player campaign so you won't be able to access its co-op Firefight mode.
To be eligible for the free ODST remake, you need to have played Halo: MCC online by December 19th. 343 may sell it separately to owners who aren't eligible in the future. They haven't announced any specific plans to do so, though.
Read More