Solitary.Here’s how it works: if the player only owns Halo: Anniversary but not Halo: Reach, they will launch the Anniversary maps from the disc menu. However, if the player owns both Halo: Anniversary and Halo: Reach, they can download the maps to Reach using the Anniversary Map Pack code that comes with the Anniversary game. The player can then run the Anniversary maps from both Anniversary and Reach. If you own Reach and buy the DLC, you play it normally as any other DLC.
Players gaming on Anniversary will be able to face off against Reach players, provided they are all playing on the Anniversary Map Pack.
The maps in the DLC include:
Breakneck (8 - 16 players): Section 21 once looked out onto the New Mombasa Orbital Elevator with pride and optimism. Now, with much of the city flooded by the Covenant’s brutal assault, the skyline is only a shattered ghost of what it once was as the battle for humanity’s survival continues on the streets and corridors below.
High Noon (4 - 12 players): The vast generator complexes which power this enormous slipspace portal allow it to connect with an unknown number of locations across the galaxy. However, passage through this system requires a Forerunner keyship, and few command such a vessel this long after the disappearance of the portal’s creators.
Penance (2 - 8 players): As the primary satellite of the Unggoy homeworld, Buwan provides the perfect environment for this massive Covenant hydro-facility used to power and refuel a variety of capital ships. Though still operational via automated subsystems, the station was abandoned shortly after the breaking of the Covenant.
Ridgeline (8 - 16 players): Once serving as a watchpoint for the immense relay complex below, the monitoring outposts nestled atop this ridge became a staging ground for human forces during their time on Installation 04. Toward the end of the conflict, a Covenant assault brought the resistance of the marines here to a tragic end.
Solitary (2 - 8 players): These spinning confinement platforms are a testament to the technological prowess of the Forerunners. In the event of a security breach, the facility’s suborbital location and frigid temperature were thought to be able to keep any threat at bay, but it appears those plans were… optimistic.
Installation 04 (1 - 4 players): When the UNSC Pillar of Autumn arrived at Alpha Halo—also known as Installation 04—the Covenant was already there to welcome them. The conflict that followed raged across the surface of the ringworld, eventually pitting the renowned and battle-hardened ODSTs against a merciless Covenant assault, which would stop at nothing to control Halo.
Detailed top-down views of each map are available on the official site here.
