Challenges

Challenges are daily objectives for Halo: Reach posted on Bungie.net. All challenges are reset at 11am GMT (3am PDT) with Daily Challenges resetting each day and Weekly Challenges resetting each Monday at that same time. A player is awarded a certain number of Credits after completing an objective.

Players who complete a Weekly challenge are awarded the achievement One Down, 51 to Go. Players who complete all of the Daily Challenges on a single day are awarded the achievement A New Challenger.

Challenges
{|align="center" cellpadding="3" border="1" !Icon !Name !Requirement !Credit Reward !Date !colspan="5"|Weekly Challenges That's Dedication, Holmes !colspan="5"|Daily Challenges
 * -align="center"
 * -align="center"
 * -align="center"
 * [[File:Bnet-challenge-icon1.png]]
 * style="text-align: center"|Complete 77 games in multiplayer Matchmaking this week.
 * 11,000 cR
 * January 31-February 7, 2011
 * -align="center"
 * -align="center"
 * [[File:Bnet-challenge-icon3.png]]

Heroic Killagruntjaro!
Earn 10 multikills in a Firefight Matchmaking game on Heroic or harder.
 * style="text-align:left"|
 * 1000 cR
 * February 3, 2011
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 * [[File:Bnet-challenge-icon3.png]]

That Pink Mist

 * style="text-align: center;"|Kill 20 enemies with a Supercombine from the Needler or Needle Rifle in Firefight Matchmaking.
 * 1650 cR
 * February 3, 2011
 * -align="center"
 * [[File:Bnet-challenge-icon3.png]]

Heroic Holdout

 * style="text-align: center;"|Kill 100 enemies on Holdout on Heroic in Firefight Matchmaking.
 * 2000 cR
 * February 3, 2011
 * -align="center"
 * [[File:Bnet-challenge-icon3.png]]

Flat Tire
Kill 10 enemy vehicles in Firefight Matchmaking.
 * style="text-align:left"|
 * 1500 cR
 * February 3, 2011
 * }

Miscellaneous

 * On 11/27/10 there had been exactly 300 Daily Challenges
 * On 1/16/11 there had been exactly 500 Daily Challenges
 * On 1/19/11 Bungie revealed the location of a BOB in the Challenge titled: "Golden Tree City" the description read: "Find and kill the Gold Ranger-class Elite in a Banshee, fast and low, while on New Alexandria, on Legendary." this was one of the only BOB's in question of location until this day, the only one left is Exodus.
 * On 1/31/11 there was a daily challenge called "Explosive Ordnance Distribution". To get this, players must kill 5 enemy players in a multiplayer matchmaking game with ordnance weapons which include: the Rocket Launcher, Sniper Rifle, Spartan Laser, Grenade Launcher, Fuel Rod Gun, Concussion Rifle, Focus Rifle, and the Plasma Launcher
 * On 2/10/11 there had been exactly 600 Daily Challenges.

Mistakes/Errors

 * On 12/3/10 Bungie.net made an error in programing or forgot to fill in "required_count" resulting in a challenge displaying: "Single wield. Earn {required_count} kills with small arms weapons in multiplayer Matchmaking." This only affected the display on Bungie.net, on Reach the challenge was displayed in its intended form.

The "Year-long Challenge"
A list of (known) gamertags that have all the daily AND weekly challenges:
 * Nak3d Eli

A list of (known) gamertags that have all the weekly challenges:
 * GothikaSpawn
 * Phoenix6000