“Defy the Covenant”
— Defiant Map Pack motto
Defiant map pack is the second DLC map pack for . It was released on March 15, 2011, at the cost of 800 Microsoft Points. The map pack includes 6 new achievements that would amount to a total of 150 Gamerscore, and two multiplayer maps, Halo: Reach Condemned and Highlands, and a Firefight map, Unearthed. It is now free.
Candy From a Baby - 75G
Capture two flags from an enemy capture zone in a matchmade Stockpile game.
Crackin' Skulls - 45G
Kill 3 players with the Oddball in a matchmade Oddball game.
Return to Sender - 30G
Successfully return two flags in a matchmade CTF game.
Paper Beats Rock - 15G
Assassinate a player who has just exited armor lock
All Alone - 10G
Be the last human player in a matchmade Infection game.
Don't Touch That! - 25G
Prevent the attacking team from taking the flag in a matchmade 1-Flag CTF game.
On Condemned, if you look outside and focus your attention on the Banshees, they are actually the Ground Support Aircraft, not the Space Banshees seen in in Long Night of Solace
Halo: Reach. Also on Condemned, destroyed Sabre Fighters explode in a blue purple explosion, similar to how Covenant vehicles explode. This is strange, as most UNSC vehicles explode in a red orange explosion.
It is possible to unlock the Candy from a Baby, Crackin' Skulls and Return to Sender achievements via Custom Games by using the official game modes from Matchmaking.
The Defiant map pack was developed by Certain Affinity and published by 343 Industries of Microsoft.
 The maps, Condemned and Highlands are based on known locations found in the Halo novels.
If you go close to the downed Pelican in Highlands, you can hear a radio coming from the cockpit, although the comm chatter is filled with static.
In some screenshots for the map pack, a new, unused helmet can be seen. It was originally going to be the GRD helmet, but due to time constraints, was cut from the final version.
Concept Art Edit
Reach, for the map "Condemned"
The laser room, for the map "Condemned"
Covenant ships glassing the surface of Reach, for the map "Highlands"
An alternate repair bay with a Pelican, on Condemned
An alternate anti-gravity room, with a laser instead, on Condemned
Bungie.net - Defiant Map Pack ↑
Major Nelson: Announcing the Halo: Reach Defiant Map Pack