The Defiant Map Pack DLC for Halo: Reach is now available on Xbox Live Marketplace. The downloadable content includes three brand new multiplayer maps and 150 Achievement points for 800 Microsoft Points.
To recap, the maps included in the DLC are:
Condemned: Orbital Station Gamma, a massive space station high in orbit above the planet Reach. The map supports 6 – 12 players in a variety of action-packed game types, including Team Slayer, Team Objective and Free for All.
Highlands: The top-secret Military Wilderness Training Preserve on Reach. Highlands specializes in 8 – 16 players in Big Team Battle, Team Slayer and Team Objective.
Unearthed: A large Titanium mine and refinery located in the Viery civilian sector of the planet. The map allows up to 4 players to launch a counterassault against the Covenant in Firefight and Firefight modes such as Generator Defense.