Commendations

Commendations are awards that players advance through Halo: Reach, during campaign, multiplayer, and online firefight gameplay. Players earn credits as they perform certain actions, many of which are Medals in and of themselves. Additional credits are earned upon reaching a commendation milestone, for example by accumulating a certain number of Assist Medals. Commendations are intended to also serve as an indication of how a given player tends to operate. Commendations cannot be advanced on the Easy difficulty.

Although some have similar names and even identical icons, commendations are not to be confused with medals.

Levels

 * Iron rank (1 bar): rewards 100 - 500 cR (Average = 200 cR)


 * Bronze rank (2 bars): rewards 200 - 1250 cR (Average = 700 cR)


 * Silver rank (3 bars): rewards 400 - 2000 cR (Average = 1000 cR)


 * Gold rank (4 bars): rewards 400 - 3000 cR (Average = 2400 cR)


 * Onyx rank (black bars): rewards 400 - 3000 cR (Average = 2400 cR)


 * Maxed Out commendations look the same as Onyx but with flames if viewed on Bungie.net there is no cR reward for maxing any commendation.

Cannon Fodder
Kill any Infantry Class enemy in Campaign

Demon
Complete a mission of Campaign

Flawless Cowboy
Complete a Campaign mission on Heroic or Legendary without dying. (Lone Wolves does not count)

Leadership Element
Kill a leader-class enemy in Campaign.

Nice Arm
Kill an enemy with a Frag or Plasma Grenade in Campaign

Pinpoint
Kill an enemy with a headshot during the Campaign.

Precisely
Kill an enemy with a precision weapon in Campaign (DMR, Needle Rifle, Focus Rifle, Sniper Rifle)

Right of Way
Kill an enemy vehicle in Campaign

Small Arms
Kill an enemy with a pistol in Campaign. (Pistol, Plasma Pistol)

SpecOps
Kill a specialist-class enemy in Campaign.

Splash Damage
Kill an enemy with a heavy weapon during the Campaign (Rocket Launcher, Grenade Launcher, Plasma Launcher, Spartan Laser, Concussion Rifle, Fuel Rod Gun, Target Locator)

Standard Issue
Kill an enemy with an automatic weapon during the Campaign. (Needler, Assault Rifle, Plasma Rifle, Plasma Repeater, Spiker)

Super Soldier
Earn a spree of any type during the Campaign

Support Role
Earn an assist in Campaign

Walking Tank
Earn a multikill during the Campaign.

War Machine
Kill an enemy with a vehicle in Campaign

Backup
Earn an assist in Firefight Matchmaking.

Dome Inspector
Kill an enemy with a headshot in Firefight Matchmaking.

Get Loud
Earn a kill with a heavy weapon in Firefight Matchmaking. (Rocket Launcher, Grenade Launcher, Plasma Launcher, Spartan Laser, Concussion Rifle, Fuel Rod Gun, Target Locator)

Grounded
Kill an enemy vehicle in Firefight Matchmaking.

In Command
Kill a Leader-class enemy in Firefight Matchmaking.

(Only Elites count towards this commendation.)

Longshot
Kill an enemy with a precision weapon in Firefight Matchmaking. (DMR, Needle Rifle, Focus Rifle, Sniper Rifle)

Methodical
Earn a spree of any type in Firefight Matchmaking.

Numbers Game
Earn any multikill in Firefight Matchmaking.

Perfectionist
Complete a round without dying in Firefight Matchmaking.

Pull the Pin
Kill an enemy with a Frag grenade or Plasma grenade in Firefight Matchmaking.

Riflin' Through
Kill an enemy with an automatic weapon in Firefight Matchmaking. (Needler, Assault Rifle, Plasma Rifle, Plasma Repeater, Spiker)

Specialized
Kill a specialist-class enemy in Firefight Matchmaking.

(Brutes, Jackals, and Skirmishers count towards this commendation, regardless of in-game class designation. Hunters may fall into this category as well.)

Target Practice
Kill an infantry-class enemy in Firefight Matchmaking.

(Grunts are the only enemies counted towards this commendation.)

Trigger Happy
Kill an enemy with a pistol in Firefight Matchmaking (Magnum, Plasma Pistol)

Vehicular
Kill an enemy with a vehicle in Firefight Matchmaking. (Turrets fall under this Commendation.)

Any Spree
Earn any type of spree in Multiplayer Matchmaking

Assistant
Earn an assist in Multiplayer Matchmaking

Close Quarters
Kill an enemy in close quarters combat in Multiplayer Matchmaking (Grav Hammer, Energy Sword, Shotgun, Melee)

Crack Shot
Kill an enemy with a precision weapon in Multiplayer Matchmaking (DMR, Needle Rifle, Focus Rifle, Sniper Rifle)

Downshift
Be a vehicle's driver while a passenger on a mounted weapon(Ex. Warthog Turret) kills an enemy in Multiplayer Matchmaking. (Passenger kills from side seats do not count)

Grenadier
Kill an enemy with a Frag grenade or Plasma grenade in Multiplayer Matchmaking.

Heavy Weapon
Kill an enemy with a heavy weapon in Multiplayer Matchmaking. (Rocket Launcher, Grenade Launcher, Plasma Launcher, Spartan Laser, Concussion Rifle, Fuel Rod Gun)

Jack of All Trades
"Perform an incredible feat in Multiplayer Matchmaking." (Hijacker, Skyjacker, Revenge, Avenger, Yoink, EMP Kill, Assist, Rejection, First Strike, Close Call, Extermination, Killjoy, Kill From The Grave, Firebird, Pull, Showstopper, and Bulltrue Medals all increment this.)

Mobile Asset
Kill an enemy with a vehicle in Multiplayer Matchmaking.

Multikill
Earn any multikill in Multiplayer Matchmaking

One Shot
Kill an enemy with a headshot in Multiplayer Matchmaking.

Rear Admiral
Kill an enemy with an assassination in Multiplayer Matchmaking

Sidearm
Kill an enemy with a pistol in Multiplayer Matchmaking (Pistol, Plasma Pistol)

Trigger Man
Kill an enemy with an automatic weapon in Multiplayer Matchmaking (Needler, Assault Rifle, Plasma Rifle, Plasma Repeater, Spiker)

Trivia

 * The highest commendation completion at the moment is "Supers0ak FTW" who is at 99%, needing Grounded (Firefight: Enemy Vehicle Kills; Needs Onyx) and Perfectionist (Firefight: Complete a round without dying; Needs Gold and Onyx).