- Swap Meet
Trade weapons with an AI ally in Campaign.
- A Spoonful of Blamite
Kill 10 enemies in Firefight or Campaign with a supercombine explosion.
- Protocol Dictates Action
Complete the 3rd mission on Normal or harder.
- That's a Knife
Perform an Assassination on an enemy.
- I Need a Weapon
Complete the 4th mission on Normal or harder.
- Your Heresy Will Stay Your Feet
Kill the Elite Zealot before he can escape during the 5th mission.
- To War
Complete the 5th mission on Normal or harder.
- Wake Up, Buttercup
Destroy the Corvette's engines & escort in under 3 minutes in the 6th mission on Heroic or harder.
- You Flew Pretty Good
Complete the 6th mission on Normal or harder.
- Lucky Me
Earn a Triple Kill while Jetpacking in Campaign, Firefight or Matchmaking.
- Into the Howling Dark
Complete the 7th mission on Normal or harder.
- The Start of Something
Reach the rank of Corporal in the UNSC.
- I Didn't Train to Be a Pilot
Kill 3 of the anti-aircraft batteries during the 8th mission.
- Dust and Echoes
Complete the 8th mission on Normal or harder.
- Tank Beats Everything
Finish the 9th mission on Legendary with the Scorpion intact.
- Banshees, Fast and Low
Hijack a Banshee during the Reach Campaign.
- This is Not Your Grave...
Complete the 9th mission on Normal or harder.
- If They Came to Hear Me Beg
Perform an Assassination against an Elite to survive a fall that would've been fatal.
- Send Me Out... with a Bang
Complete the 10th mission on Normal or harder.
- Folks Need Heroes...
Complete the Campaign on Heroic difficulty.
- The Soldier We Needed You To Be
Complete the Campaign on Normal difficulty.
- What's a Killing Spree?
Earn a Killing Spree in multiplayer Matchmaking.
- Be My Wingman, Anytime
Let a teammate spawn on you 5 times in an Invasion Matchmaking game.
Win a game of Invasion in the 1st phase.
- Yes, Sensei
Earn a First Strike Medal in a Matchmaking game.
- Knife to a Gunfight
As an Elite, kill 5 Spartan players in Matchmaking.
- Score Attack
Score 15,000 points in Score Attack Firefight Matchmaking.
- Crowd Control
Earn a Killionaire medal in Firefight.
- Game, Set, Match
Complete a Firefight set on Legendary without dying.
Score 50,000 points in Firefight on any map.
- Blaze of Glory
Score 200,000 points in Firefight on any map.
- Heat in the Pipe
Score 1,000,000 points in Firefight on any map.
- A Storage Solution
Using the File Browser upload a file to your File Share.
- One Down, 51 to Go
Complete a Weekly Challenge.
- Cool File, Bro
Recommend a file to someone.
- A New Challenger
Complete all of the Daily Challenges in a given day.
- An Honor Serving
Reach the rank of Captain in the UNSC.
- Lemme Upgrade Ya
Advance any Commendation to its Silver state.
- Make It Rain
Purchase an item from the Armory that requires the rank of Lt. Colonel.