The Crimson map pack is the first DLC map pack released for use in War Games and Forge in Halo 4. It includes three new maps and was released on December 10, 2012, for $9.99 USD or for free with the War Games Map Pass.
|Wreckage||Wreckage is a medium sized asymmetrical map capable of accommodating a wide range of objective based gametypes. The environment of the map resembles a field of debris littered with winding paths and stretches, allowing for players to utilize spaces for confusing opponents or remaining in cover.|
|Harvest||Harvest is a small to medium sized symmetrical map perfect for objective gametypes such as Capture the Flag. The environment of the map is based on the agricultural world Harvest, and resembles an industrial human complex consisting of two bases at either end of the map.|
|Shatter||Shatter is a large symmetrical map designed for big team battles and the use of vehicles. The environment of the map resembles large crystalline surfaces littered with UNSC mining facilities.|
The Crimson Map Pack includes eight additional achievements worth a total of 250 Gamerscore.
|Now They Fly?||In Crimson DLC matchmaking, get a kill while airborne in a Warthog.||50G|
|Size Is Everything||In Crimson DLC matchmaking, kill 20 enemies with a detached Machine Gun Turret.||20G|
|ODST||In Crimson DLC matchmaking, kill a player while you're airborne from using a Man Cannon.||30G|
|Bigfoot||In Crimson DLC matchmaking, kill 20 enemies using the Mantis' stomp attack.||20G|
|David and Goliath||In Crimson DLC matchmaking, board an enemy Mantis.||20G|
|Clay Pigeon||In Crimson DLC matchmaking, shoot an enemy out of the air while they use the Man Cannon.||40G|
|Special Delivery||In Crimson DLC matchmaking, kill an enemy with a melee attack when landing from a Man Cannon.||30G|
|Pump Yer Brakes||In Crimson DLC matchmaking, score the killing blow on a Mantis.||40G|
- The Crimson map pack was first announced on October 24, 2012, in a Microsoft press release.
- The Crimson map pack was named after Fireteam Crimson.