The DLC comes with three maps including Wreckage, an asymmetrical map resembling a field of debris littered with winding paths and stretches, allowing a max of 16 players on Infinity Slayer and 12 players on other gametypes. Harvest is a smaller symmetrical map supporting 8-12 players for objective gametypes such as Capture the Flag.
Finally, Shatter is a large symmetrical Big Team Battles map designed for the use of vehicles. The environment of the map resembles large crystalline surfaces littered with UNSC mining facilities and supports 16 players on Infinity Slayer, and 12 players on other gametypes.
The map pack also comes with 8 Achievements, which have been detailed here.
Gamers without the season pass can purchase the map pack via the Xbox Live Marketplace or queue it up on Xbox.com here.