- Capacious Cartography
Halo: Reach: Create a custom map using Forge World.
- Generous Tipper
Halo: Reach: Beat the par time on Tip of the Spear.
- Yes No You Decide
Halo: Reach: Find Data Pad 19 on Lone Wolf on Legendary difficulty
- Canonical Conundrum
Halo: Reach: Find all Data Pads.
- The Soldier We Need You To Be
Halo: Reach: Complete every level of the game on Normal difficulty.
- Folks Need Heroes…
Halo: Reach: Complete every level of the game on Heroic difficulty.
- Gods Must Be Strong
Halo: Reach: Complete every level of the game on Legendary difficulty.
- A Monument To All Your Sins
Halo: Reach: Complete every level of the game on Legendary difficulty, by yourself.
- Assembled the Majority
Halo: Reach: Find Data Pad 18 on The Pillar Of Autumn on Legendary difficulty
- Silent Shepherds
Halo: Reach: Find Data Pad 17 on The Package on Legendary difficulty
- Tank Beats Everything
Halo: Reach: Finish The Package on Legendary with the Scorpion intact.
- Nine Lives Are a Myth
Halo: Reach: Beat the par score on New Alexandria.
- I Didn't Train To Be A Pilot
Halo: Reach: Kill 3 of the anti-aircraft batteries during New Alexandria.
- Curious Composition
Halo: Reach: Find Data Pad 16 on New Alexandria on Legendary difficulty
- Of Patience and Partiality
Halo: Reach: Find Data Pad 15 on Exodus on Legendary difficulty
- The Answer is Simple
Halo: Reach: Find Data Pad 14 on Long Night Of Solace on Legendary Difficulty
- Meddling and Madness
Halo: Reach: Find Data Pad 13 on Tip Of The Spear on Legendary difficulty
- Your Heresy Will Stay Your Feet
Halo: Reach: Kill the Elite Zealot before he can escape during Tip of the Spear.
- Moon's Out, Goons Out
Halo: Reach: Beat the par score on Nightfall.
- Unsolved Mysteries
Halo: Reach: Find Data Pad 12 on Nightfall on Legendary difficulty
- Easy to Overlook
Halo: Reach: Access hidden UNSC radio chatter.
- Confused Callouts
Halo: Reach: Trigger a humorous callout on your HUD's position indicator.
- Keep It Clean
Halo: Reach: Kill 7 Moa during Winter Contingency.
- Collection Eligibility Confirmed
Halo: Reach: See, he IS in the game!
- What Does It All Mean?
Halo: Reach: Find Data Pad 11 on ONI: Sword Base on Legendary difficulty
- Still Sharp
Halo: Reach: Beat the par score on ONI: Sword Base.
- Ice In Your Veins
Halo: Reach: Beat the par score on Winter Contingency.
- Unreliable Narrator
Halo: Reach: Find Data Pad 10 on Winter Contingency on Legendary difficulty
- Clear and Present Danger
Halo: Reach: Pad on the run.
- Reach Has Been Good to Me
Halo: Reach: Complete a Halo: Reach playlist.
- Send Me Out... With A Bang
Halo: Reach: Complete The Pillar of Autumn.
- Welcome to Reach
Halo: Reach: Complete every level of the game on Easy difficulty.
- Wait, How'd the Ship Get Down Here?
Halo: Reach: Beat the par time on The Pillar of Autumn.
- Digital Destinies
Halo: Reach: Find Data Pad 9 on The Pillar Of Autumn
- This Is Not Your Grave
Halo: Reach: Complete The Package.
- Speedy Delivery
Halo: Reach: Beat the par time on The Package.
- Terminal Conditions
Halo: Reach: Find Data Pad 8 on The Package
- Dust And Echoes
Halo: Reach: Complete New Alexandria.
- Play Us a Sad Song, Claude
Halo: Reach: Listen to a hidden music cue.
- HBOrg Special
Halo: Reach: Party with the DJ Brute.
- Front Page News
Halo: Reach: Find me in the club.
- Paper Trail
Halo: Reach: Find Data Pad 7 on New Alexandria
- New Ways to Save a Buck
Halo: Reach: Hear a familiar voice on New Alexandria.
- Info Dump
Halo: Reach: Find Data Pad 6 on Exodus
- Into The Howling Dark
Halo: Reach: Complete Exodus.
- Quicker Than Reading the Book
Halo: Reach: Beat the par time on Exodus.
- The Humble Beginnings of Wiljax Brantley
Halo: Reach: Now that's a value meal.
- No Picnic
Halo: Reach: Observe a grizzy scene on New Alexandria.
- You Flew Pretty Good
Halo: Reach: Complete Long Night of Solace.
- Jorge Can't Have All the Big Guns
Halo: Reach: Use a Pelican turret.
- Minority Report
Halo: Reach: Find Data Pad 5 on Long Night Of Solace
- To War
Halo: Reach: Complete Tip of the Spear.
- Rampant Speculation
Halo: Reach: Find Data Pad 4 on Tip Of The Spear
- Mind the Skill Gap
Halo: Reach: Observe the logo of a buttoned-up mining company.
- T'vaoan Terminator
Halo: Reach: Kill 100 Skirmishers.
- Workers' Compensation
Halo: Reach: Splatter an enemy using the forklift.
- I Need A Weapon
Halo: Reach: Complete Nightfall.
- Read Halsey's Journal
Halo: Reach: Find Data Pad 2 on ONI: Sword Base
- Enemies Everywhere!
Halo: Reach: Complete a Firefight set on Normal or Harder.
- Winter Urgency
Halo: Reach: Beat the par time on Winter Contingency.
- What About Bob?
Halo: Reach: Find and eliminate one of the hidden Ranger Commander Elites.
- Hey, You Dropped This
Halo: Reach: Find Data Pad 1 on Winter Contingency
- Meeting of the (Artificial) Minds
Halo: Reach: Find Data Pad 3 on Nightfall
- Protocol Dictates Action
Halo: Reach: Complete ONI: Sword Base.
- Two Corpses In One Grave
Halo: Reach: Kill 2 vehicles at once with the Target Locator during ONI: Sword Base.
- We're Just Getting Started
Halo: Reach: Complete Winter Contingency.
- I'm Sorry, Dave
Halo: Reach: Find the hidden binary signature.
- Just Like Storming a Castle
Halo: Reach: Beat the par time on ONI: Sword Base.
- Now Just You Gúta Minute
Halo: Reach: Beat the par time on Nightfall.
- Sabre Metrics
Halo: Reach: Beat the par time on Long Night of Solace.
- One For the Record Books
Halo: Reach: Beat the par time on New Alexandria.
- Fast Fall
Halo: Reach: Beat par time on all Halo: Reach levels.
- Bake That Cake
Halo: Reach: Beat the par score on Tip of the Spear.
- Insomnia
Halo: Reach: Beat the par score on Long Night of Solace.
- Parting the Sea
Halo: Reach: Beat the par score on Exodus.
- How Did I Lose All My Fingers?
Halo: Reach: Beat the par score on The Package.
- Precious Cargo
Halo: Reach: Beat the par score on The Pillar of Autumn.
- We'll Be Back
Halo: Reach: Beat the par score on every Halo: Reach level.
- Chol Von's Not Gonna Like This
Halo: Reach: Kill 1000 Skirmishers.
- They've Always Been Faster
Halo: Reach: Clear Winter Contingency without setting foot in a drivable vehicle.
- Wake Up Buttercup
Halo: Reach: Destroy the Corvette's engines & escort in under 3 minutes during Long Night of Solace
- Swift and Shallow
Halo: Reach: Hijack a Banshee during the Reach Campaign.
- Forza in the Fall
Halo: Reach: Flip the switches to become a Reach Racer!
- We're Gonna Need a Bigger Ship
Halo: Reach: Fly both the Pelican and Phantom on New Alexandria.
- Did You Major in Marine Bio?
Halo: Reach: Encounter the hidden marines on Exodus.
- Fly, You Fools!
Halo: Reach: Find the hidden Banshees on The Package.
- This is Not the Greatest Lab in the World…
Halo: Reach: Find your way into Halsey's Lab on The Package.
- Why Do This To Yourself?
Halo: Reach: Complete the Halo: Reach LASO Campaign playlist.
- Who Needs Red Flag?
Halo: Reach: Complete three Halo: Reach playlists.
- Remember Reach
Halo: Reach: Play a game of Halo: Reach on the 14th of any month.
- Keep Your Foot on the Pedrogas
Halo: Reach: Complete all Halo: Reach Legendary campaign missions in under 3 hours.
- Negative, Ghostrider
Halo: Reach: Get a Skullamanjaro in a matchmade Headhunter game.
- Skunked
Halo: Reach: Won a matchmade game of Invasion in the 1st phase.
- Left Behind
Halo: Reach: Achieve a score of 30,000 points on Lone Wolf.
- One Final Firefight
Halo: Reach: Achieve a score of 150,000 points on Lone Wolf.
- Requiescat in Pace
Halo: Reach: Complete 10 assassinations on enemy players.
- Run and Gunned
Halo: Reach: Headshot 10 enemies while they are sprinting.
- Game Breaker
Halo: Reach: Kill 10 enemies while using a Jetpack.
- Because It Wasn't Hard Enough
Halo: Reach: Complete a Legendary campaign mission with 3 or more skulls enabled (Scoring Only).
- Classic Completion
Halo: Reach: Complete Exodus without using any armor abilities.
- Why Am I Here?
Halo 2: View this hidden message on the classic Beaver Creek map.
- He's Running a Marathon...
Halo 2: Spot the developer in the opening cutscene of Gravemind on Legendary in Classic Mode.
- Big Green Style
Halo 2: Complete every level of the game on Easy difficulty.
- Cairo Station
Halo 2: Complete Cairo Station.
- Outskirts
Halo 2: Complete Outskirts.
- Metropolis
Halo 2: Complete Metropolis.
- The Arbiter
Halo 2: Complete The Arbiter.
- Oracle
Halo 2: Complete The Oracle.
- Delta Halo
Halo 2: Complete Delta Halo.
- Regret
Halo 2: Complete Regret.
- Sacred Icon
Halo 2: Complete Sacred Icon.
- Quarantine Zone
Halo 2: Complete Quarantine Zone.
- Gravemind
Halo 2: Complete Gravemind.
- Uprising
Halo 2: Complete Uprising.
- High Charity
Halo 2: Complete High Charity.
- The Great Journey
Halo 2: Complete The Great Journey.
- Reed the Strategy
Halo 2: Beat the par time on The Oracle.
- Terminal Velocity
Halo 2: Beat the par time on Sacred Icon.
- Feeling Charitable
Halo 2: Beat the par time on High Charity.
- Ripple Fire
Halo 2: Beat the par score on Metropolis.
- Heresy Will Not Stay My Feet
Halo 2: Beat the par score on The Arbiter.
- Boundless
Halo 2: Beat the par score on Delta Halo.
- Scorched Earth
Halo 2: Beat the par score on High Charity.
- Frequent Flyer Miles
Halo 2: Beat the par score on The Great Journey.
- Curious
Halo 2: Activate Terminal 1 on Cairo Station.
- Inquisitive
Halo 2: Activate Terminal 2 on Outskirts.
- Examiner
Halo 2: Activate Terminal 3 on Metropolis.
- Inspector
Halo 2: Activate Terminal 4 on The Arbiter.
- Fascinated
Halo 2: Activate Terminal 5 on The Oracle.
- Enchanted
Halo 2: Activate Terminal 6 on Delta Halo.
- Enamored
Halo 2: Activate Terminal 7 on Regret.
- Determined
Halo 2: Activate Terminal 8 on Sacred Icon.
- Delighted
Halo 2: Activate Terminal 9 on Quarantine Zone.
- Knowledgable
Halo 2: Activate Terminal 10 on Gravemind.
- Scholar
Halo 2: Activate Terminal 11 on Uprising.
- Reviewer
Halo 2: Activate Terminal 12 on High Charity.
- Obsessed
Halo 2: Activate Terminal 13 on The Great Journey.
- Walking Encyclopedia
Halo 2: Activate all Halo 2 Terminals.
- Don't Make a Girl a Promise
Halo 2: Collect the Cortana toy in Gravemind.
- Warrior
Halo 2: Complete every level of the game on Normal difficulty.
- Six Pedals, Four Directions
Halo 2: Drive a Scorpion while playing as the Arbiter.
- THE Chips Dubbo?
Halo 2: Fight alongside the legendary Chips Dubbo and listen to his words.
- Animal Habitat
Halo 2: Spot the hippo on the walls of Headlong in classic multiplayer.
- Sid Graffiti
Halo 2: Spot the Sid graffiti on the walls of Coagulation in classic multiplayer.
- Why So Serious
Halo 2: View the smiling face in the classic multiplayer map Coagulation.
- Silent but Deadly
Halo 2: Kill 7 opponents from behind in a row without being spotted.
- Go Ape Shiv
Halo 2: Kill an enraged, berserk Brute using melee.
- Tour of Duty
Halo 2A MP: Complete a game in every one of the 6 updated Anniversary MP maps.
- Warden
Halo 2 MP: In Classic or Anniversary matchmaking, stop the killing spree of another player.
- Flaming Ninja Anniversary
Halo 2A MP: Kill an opponent that has the Ninja Redux achievement in Anniversary matchmaking.
- Back At It
Halo 2: Play a game of Halo 2 Anniversary on the 9th of any month.
- Tighten Up The Graphics
Halo 2: Complete every level of Halo 2 having seen it in both classic and remastered mode.
- Red vs. Blue
Halo 2A MP: Win 10 matches on Bloodline in multiplayer.
- Dirty Bird
Halo 2: Fly the Heretic Banshee.
- Decorated Warrior
Halo 2A MP: Get awarded at least 10 different medals in one multiplayer game.
- Legend Slayer
Halo 2A MP: Kill an opponent that has the Legendary Anniversary achievement.
- Counter-Sniped
Halo 2A MP: With a Sniper Rifle or Beam Rifle kill an enemy that was zoomed in.
- Don't Hangar Around
Halo 2: Beat the par time on Cairo Station.
- Rooftop Runner
Halo 2: Beat the par time on Outskirts.
- Speeding Ticket
Halo 2: Beat the par time on Metropolis.
- YOLO Strats
Halo 2: Beat the par time on The Arbiter.
- So You Don't Want the Tank?
Halo 2: Beat the par time on Delta Halo.
- I Regret Nothing
Halo 2: Beat the par time on Regret.
- Hot Zone
Halo 2: Beat the par time on Quarantine Zone.
- Force of Will
Halo 2: Beat the par time on Gravemind.
- No Man's Land
Halo 2: Beat the par time on Uprising.
- Are We There Yet?
Halo 2: Beat the par time on The Great Journey.
- Going Nowhere Fast
Halo 2: Beat par time on all Halo 2 levels.
- Bomb Squad
Halo 2: Beat the par score on Cairo Station.
- Objective Secured
Halo 2: Beat the par score on Outskirts.
- Leave None Alive
Halo 2: Beat the par score on The Oracle.
- Fists of Fury
Halo 2: Beat the par score on Regret.
- Guided Tour
Halo 2: Beat the par score on Sacred Icon.
- The Doctor Is In
Halo 2: Beat the par score on Quarantine Zone.
- Official Business
Halo 2: Beat the par score on Gravemind.
- The Hype Is Real
Halo 2: Beat the par score on Uprising.
- Arcade Owner
Halo 2: Beat the par score on every Halo 2 level.
- Skulltaker Halo 2: That's Just…Wrong
Halo 2: Find and claim the That's Just...Wrong Skull on Legendary.
- Skulltaker Halo 2: Thunderstorm
Halo 2: Find and claim the Thunderstorm Skull on Legendary.
- Skulltaker Halo 2: Blind
Halo 2: Find and claim the Blind Skull.
- Skulltaker Halo 2: IWHBYD
Halo 2: Find and claim the IWHBYD Skull on Legendary.
- Skulltaker Halo 2: Catch
Halo 2: Find and claim the Catch Skull on Legendary.
- Skulltaker Halo 2: Grunt Birthday Party
Halo 2: Find and claim the Grunt Birthday Party Skull on Legendary.
- Skulltaker Halo 2: Famine
Halo 2: Find and claim the Famine Skull on Legendary.
- Skulltaker Halo 2: Envy
Halo 2: Find and claim the Envy Skull on Legendary.
- Skulltaker Halo 2: Assassins
Halo 2: Find and claim the Assassins Skull on Legendary.
- Skulltaker Halo 2: Mythic
Halo 2: Find and claim the Mythic Skull on Legendary.
- Skulltaker Halo 2: Sputnik
Halo 2: Find and claim the Sputnik Skull on Legendary.
- Skulltaker Halo 2: Anger
Halo 2: Find and claim the Anger Skull on Legendary.
- Skulltaker Halo 2: Ghost
Halo 2: Find and claim the Ghost Skull on Legendary.
- Skulltaker Halo 2: Iron
Halo 2: Find and claim the Iron Skull on Legendary.
- Skulltaker Halo 2: Black Eye
Halo 2: Find and claim the Black Eye Skull on Legendary.
- Trophy Collector
Halo 2: Find and claim all Skulls in Halo 2.
- And So It Begins...
Halo 2: Collect the Master Chief toy in Delta Halo.
- Regrettable Turn of Events
Halo 2: Collect the Prophet of Regret toy in Regret.
- The Will of the Prophets
Halo 2: Collect the Arbiter toy in Sacred Icon.
- Chieftain of the Brutes
Halo 2: Collect the Tartarus toy in Quarantine Zone.
- My Work is Done
Halo 2: Collect the Librarian toy in Uprising.
- I Like Crazy
Halo 2: Collect the Rampant Cortana toy in High Charity.
- Pyrrhic Solution
Halo 2: Collect the Didact toy in The Great Journey.
- Toybox
Halo 2: Collect all eight Halo toys.
- Hero
Halo 2: Complete every level of the game on Heroic difficulty.
- Legendary Anniversary
Halo 2: Complete every level of the game on Legendary difficulty.
- Seconds
Halo 2: Complete a Halo 2 playlist.
- Connoisseur
Halo 2: Complete three Halo 2 playlists.
- Betcha can't stick it...
Halo 2: Stick a Plasma Grenade to a Stealth Elite on Outskirts.
- Cowardly Grunt
Halo 2: Listen to the Cowardly Grunt's woes.
- Siege of Ivory Tower
Halo 2: Listen to a hidden music cue in Halo 2.
- Rex Sword
Halo 2: Grab the energy sword on the level Outskirts.
- 10 Minutes Too Early
Halo 2: In The Oracle, find the holo-drone before the Heretic Leader activates it.
- HI BEN
Halo 2: Oh, hi!
- E E E
Halo 2: View both signs in the level Metropolis.
- GOOOAAAAALLLL!
Halo 2: Shoot the soccer ball in the level Metropolis.
- Needs More Whammy Bar
Halo 2: Complete the level Regret with the Prophet Birthday Skull activated.
- Like Peanut Butter and Chocolate
Halo 2: Complete a level in co-op on Heroic or Legendary with the Masterblaster Skull active.
- Starved For Shields
Halo 2: Complete a level with only the Streaking Skull active on Heroic or Legendary.
- Commuter
Halo 2: Complete Metropolis without entering a vehicle on Heroic or Legendary.
- He Never Gets Me Anything
Halo 2: Complete Delta Halo without entering a vehicle on Heroic or Legendary.
- Scarab Lord
Halo 2: Acquire the Scarab Gun.
- Demon
Halo 2: Complete any campaign level without dying on Normal or harder.
- Grand Theft Halo
Halo 2A MP: In one match, steal a total of 5 occupied vehicles from opponents.
- Double Down
Halo 2A MP: In Anniversary multiplayer, receive 2 or more Double Kill medals.
- Blown Out of the Sky
Halo 2A MP: Blow up the Banshee or Hornet in flight while piloted, with the Rocket Launcher.
- Ninja Redux
Halo 2A MP: Kill 5 people with melee from behind in Anniversary matchmaking.
- Back for More
Halo 2: Complete the LASO campaign playlist.
- Monopolized
Halo 2: Complete all Halo 2 Legendary campaign missions in under 3 hours.
- Destination Vacation
Halo 2: View one of the seasonal signs on Zanzibar in classic multiplayer.
- The Return of Megg
Halo 2: She's not picking up.
- Eminent Domain
Halo 2A MP: In Territories, control any 3 Territories simultaneously for 30 seconds.
- Gate Your Thirst!
Halo 2A MP: Found and destroyed the BLAST soda can on Stonetown.
- High Altitude Thirst!
Halo 2A MP: Found and destroyed the BLAST soda can on Zenith.
- Invaders Repelled
Halo 2A MP: In King of the Hill, kill 5 opponents within your controlled hill.
- Power Play
Halo 2A MP: On Warlord, get 5 active camouflage power ups in a single game.
- Put Up Your Dukes
Halo 2A MP: Get 25 melee kills in multiplayer.
- Rule Your Thirst!
Halo 2A MP: Found and destroyed the BLAST soda can on Warlord.
- Shields Up!
Halo 2A MP: On Zenith, personally activate the center energy shield 3 times in one matchmade game.
- Shook the Hornet's Nest
Halo 2A MP: Get 30 kills with the Hornet in multiplayer.
- Skeet Shooter
Halo 2A MP: Killed 15 opponents that were airborne from a Man Cannon.
- Stayin' Alive
Halo 2A MP: In Juggernaut, survive as the Juggernaut for 30 seconds.
- The Goose is Loose
Halo 2A MP: Get 25 kills with the Gungoose in multiplayer.
- Thirst Locked Down!
Halo 2A MP: Found and destroyed the BLAST soda can on Lockdown.
- Top Gungoose
Halo 2A MP: Get a kill with the Gungoose while airborne.
- BLASTacular!
Halo 2A MP: Destroyed all the Halo 2 Anniversary Multiplayer BLAST soda cans.
- Bloody Thirsty!
Halo 2A MP: Found and destroyed the BLAST soda can on Bloodline.
- Bombing Run
Halo 2A MP: In Assault, take, plant, and score from the bomb spawn without dying or dropping it.
- Cold as Ice
Halo 2A MP: On Lockdown, kill an opponent with the hanging ice.
- Cold Fusion
Halo 2A MP: Kill an opponent by detonating a Fusion Coil.
- Triple Threat
Halo 2A MP: In Ricochet, pass once, score once, and kill at least one enemy in the same match.
- Wetwork
Halo 2A MP: On Shrine in CTF, activate the enemy base waterfall and, before it stops, grab the flag.
- Worship Your Thirst!
Halo 2A MP: Found and destroyed the BLAST soda can on Shrine.
- Zealot
Halo 2A MP: In Anniversary matchmaking, win 10 games as an Elite.
- MVP
Halo 2A MP: Finished as the top player on the winning team in a matchmade game.
- Roadkill Rampage
Halo 2A MP: In Anniversary matchmaking, earn a total of 100 Splatter medals.
- Rock and Coil Hit Back
Halo 2A MP: In Anniversary matchmaking, earn a total of 100 Environmentalist medals.
- Tourist
Halo 2: Complete a match on at least 8 different classic multiplayer maps.
- Window Shopping
Halo 2: Complete a match on at least 4 different game types in classic multiplayer.
- Monumental Thirst!
H2A: Found and destroyed the BLAST soda can on Remnant..
- Landfall
Halo 3: Complete Sierra 117.
- Holdout
Halo 3: Complete Crow's Nest.
- The Road
Halo 3: Complete Tsavo Highway.
- Assault
Halo 3: Complete The Storm.
- Cleansing
Halo 3: Complete Floodgate.
- Refuge
Halo 3: Complete The Ark.
- Last Stand
Halo 3: Complete The Covenant.
- The Key
Halo 3: Complete Cortana.
- Return
Halo 3: Complete Halo.
- Speedy One One Seven
Halo 3: Beat the par time on Sierra 117.
- Time Shift
Halo 3: Beat the par time on Crow's Nest.
- Highway Robbery
Halo 3: Beat the par time on Tsavo Highway.
- Lightning Strike
Halo 3: Beat the par time on The Storm.
- Dambuster
Halo 3: Beat the par time on Floodgate.
- Making History
Halo 3: Beat the par time on Cortana.
- Go, Chief! Gun It!
Halo 3: Beat the par time on Halo.
- Rising Waters
Halo 3: Activate Terminal 1 on The Ark.
- Inundation
Halo 3: Activate Terminal 2 on The Ark.
- Before the Fire
Halo 3: Activate Terminal 3 on The Ark.
- Tipping Point
Halo 3: Activate Terminal 4 on The Covenant.
- Unto Dust
Halo 3: Activate Terminal 5 on The Covenant.
- Babbling Dead
Halo 3: Activate Terminal 6 on The Covenant.
- Sword and Shield
Halo 3: Activate Terminal 7 on Halo.
- The Coin's Fault
Halo 3: Activate Cortana's Terminal on Cortana.
- Whispers Across the Galaxy
Halo 3: View the communique from Mendicant Bias.
- Skulltaker Halo 3: Iron
Halo 3: Find and claim the Iron Skull on Normal or harder.
- Skulltaker Halo 3: Black Eye
Halo 3: Find and claim the Black Eye Skull on Normal or harder.
- Skulltaker Halo 3: Tough Luck
Halo 3: Find and claim the Tough Luck Skull on Normal or harder.
- Skulltaker Halo 3: Catch
Halo 3: Find and claim the Catch Skull on Normal or harder.
- Skulltaker Halo 3: Fog
Halo 3: Find and claim the Fog Skull on Normal or harder.
- Skulltaker Halo 3: Thunderstorm
Halo 3: Find and claim the Thunderstorm Skull on Normal or harder.
- Skulltaker Halo 3: Mythic
Halo 3: Find and claim the Mythic Skull on Normal or harder.
- Prophet's Bane
Halo 3: Complete every level of the game on Normal difficulty.
- With Your Shield or On It
Halo 3: Complete every level of the game on Heroic difficulty.
- Finished the Fight
Halo 3: Complete every level of the game on Legendary difficulty.
- Dirge of Madrigal
Halo 3: Trigger the hidden music cue in Halo 3.
- Primate
Halo 3: Find your first missing links.
- Haplorrhini
Halo 3: Find a lonely missing link.
- Can't Keep Him Down
Halo 3: Fight alongside and listen to The Man. The Legend. Chips Dubbo.
- Flipyap
Halo 3: Listen to the tale of a young Grunt named Flipyap.
- Heading to his Destiny
Halo 3: Destined for greatness.
- Hippo Hero
Halo 3: Who DARED to discard this brave animal?
- Milk Carton
Halo 3: Find the poster of the missing man.
- Cool Story Bro
Halo 3: Listen to the story of the Final Grunt.
- Man on the Moon
Halo 3: He's watching you.
- Missing Link
Halo 3: Watching. Waiting. Plotting.
- Training Wheels
Halo 3: Complete every level of the game on Easy difficulty.
- Skulltaker Halo 3: Grunt Birthday Party
Halo 3: Find and claim the Grunt Birthday Party Skull on Normal or harder.
- No Stone Unturned
Halo 3: Activate all Halo 3 Terminals.
- Assembly Skull
Halo 3: Find the hidden Skull on the Assembly multiplayer map.
- Orbital Skull
Halo 3: Find the hidden Skull on the Orbital multiplayer map.
- Sandbox Skull
Halo 3: Find the hidden Skull on the Sandbox multiplayer map.
- Citadel Skull
Halo 3: Find the hidden Skull on the Citadel multiplayer map.
- Heretic Skull
Halo 3: Find the hidden Skull on the Heretic multiplayer map.
- Longshore Skull
Halo 3: Find the hidden Skull on the Longshore multilayer map.
- Brainpan
Halo 3: Find all the hidden multiplayer Skulls.
- World Traveler
Halo 3: Complete a match on at least 8 different multiplayer maps.
- Waypoint
Halo 3: Beat the par time on The Ark.
- Scarab Slide
Halo 3: Beat the par time on The Covenant.
- Speed Demon
Halo 3: Beat the par time on all Halo 3 levels.
- Guerilla
Halo 3: Beat the par score on Sierra 117.
- Cavalier
Halo 3: Beat the par score on Tsavo Highway.
- Askar
Halo 3: Beat the par score on The Storm.
- Exterminator
Halo 3: Beat the par score on Floodgate.
- Ranger
Halo 3: Beat the par score on The Ark.
- Vanguard
Halo 3: Beat the par score on The Covenant.
- Orpheus
Halo 3: Beat the par score on Cortana.
- Torchbearer
Halo 3: Beat the par score on Halo.
- Better With Age
Halo 3: Beat the par score on every Halo 3 level.
- Skulltaker Halo 3: Famine
Halo 3: Find and claim the Famine Skull on Normal or harder.
- Skulltaker Halo 3: Tilt
Halo 3: Find and claim the Tilt Skull on Normal or harder.
- Begins with a Single Step
Halo 3: On Tsavo Highway, complete the level without entering a vehicle.
- Who Needs Them?
Halo 3: On The Ark, complete the level without entering a vehicle on Legendary.
- Phantom Hunter
Halo 3: Destroy 3 total Phantoms on The Covenant.
- Annual
Halo 3: Complete Halo on 4-player Legendary co-op, with Iron Skull, and everyone in Ghosts.
- Sounds Familiar
Halo 3: This stuff is your history!
- Elder Signs
Halo 3: View 2 different sigils on Valhalla.
- Third Time's A Charm
Halo 3: Play a game of Halo 3 on the 25th of any month.
- Devastating
Halo 3: Complete all Halo 3 Legendary campaign missions in under 3 hours.
- Mind the Gap
Halo 3: 4 vehicles, 1 gap on Legendary using Cowbell, Catch, Thunderstorm, Mythic, and Tough Luck.
- A Preference for Pain
Halo 3: Complete the Halo 3 LASO Campaign playlist.
- Aficiando
Halo 3: Complete three Halo 3 playlists.
- Boot Camp Hero
Halo 3: Complete a Halo 3 playlist.
- King of the Crows
Halo 3: Beat the par score on Crow's Nest.
- Witch Doctor
Halo 3: Find and claim all Skulls in Halo 3.
- Skulltaker Halo 3: Blind
Halo 3: Find and claim the Blind Skull on Normal or harder.
- Skulltaker Halo 3: Cowbell
Halo 3: Find and claim the Cowbell Skull on Normal or harder.
- Skulltaker Halo 3: IWHBYD
Halo 3: Find and claim the IWHBYD Skull on Normal or harder.
- Just Browsing
Halo 3: Complete a match on at least 4 different game types in multiplayer.
- Dawn
Halo 4: Complete Dawn.
- Requiem
Halo 4: Complete Requiem.
- Forerunner
Halo 4: Complete Forerunner.
- Infinity
Halo 4: Complete Infinity.
- Reclaimer
Halo 4: Complete Reclaimer.
- Shutdown
Halo 4: Complete Shutdown.
- Composer
Halo 4: Complete Composer.
- Midnight
Halo 4: Complete Midnight.
- Piece of Cake
Halo 4: Beat the par time on Dawn.
- Interloper
Halo 4: Beat the par time on Requiem.
- Raging in the Dark
Halo 4: Beat the par time on Forerunner.
- Ouroboros
Halo 4: Beat the par time on Infinity.
- Gimme That
Halo 4: Beat the par time on Reclaimer.
- Shut. Down. Everything.
Halo 4: Beat the par time on Shutdown.
- Symphony of Pain
Halo 4: Beat the par time on Composer.
- Countdown
Halo 4: Beat the par time on Midnight.
- Easy As One Two Three
Halo 4: Beat the par time on all Halo 4 levels.
- Gunslinger
Halo 4: Beat the par score on Dawn.
- Dark Fortress
Halo 4: Beat the par score on Requiem.
- Shadow of Sundered Star
Halo 4: Beat the par score on Forerunner.
- Jungle Warfare
Halo 4: Beat the par score on Infinity.
- Librarian's Pet
Halo 4: Beat the par score on Reclaimer.
- Emergency Shutdown
Halo 4: Beat the par score on Shutdown.
- Head Banging
Halo 4: Beat the par score on Composer.
- Witching Hour
Halo 4: Beat the par score on Midnight.
- You Had it Coming
Halo 4: Beat the par score on every Halo 4 level.
- War
Halo 4: Activate Terminal 1 on Requiem.
- Lord of Admirals
Halo 4: Activate Terminal 2 on Forerunner.
- Charum Hakkor
Halo 4: Activate Terminal 3 on Infinity.
- Flood
Halo 4: Activate Terminal 4 on Reclaimer.
- Knights
Halo 4: Activate Terminal 5 on Shutdown.
- Justice
Halo 4: Activate Terminal 6 on Composer.
- Cryptum
Halo 4: Activate Terminal 7 on Midnight.
- Terminus
Halo 4: Activate all Halo 4 Terminals.
- Wake Up, John
Halo 4: Complete every level of the game on Normal difficulty.
- I Need a Hero
Halo 4: Complete every level of the game on Heroic difficulty.
- The Legend of 117
Halo 4: Complete every level of the game on Legendary difficulty.
- Lone Wolf Legend
Halo 4: Complete every level of the game on Legendary difficulty, by yourself.
- This is my Rifle, This is my Gun
Halo 4: Carry a UNSC weapon all the way through Forerunner on Heroic or Legendary.
- Bros to the Close
Halo 4: Complete Infinity without one preventable Marine death on Heroic or Legendary.
- Explore the Floor
Halo 4: Trick or force a Hunter to fall to its demise on Shutdown on Heroic or Legendary.
- Give Him the Stick
Halo 4: Take out both Hunters using only the Sticky Detonator on Composer.
- Chief, Smash!
Halo 4: Kill 3 Crawlers in one hit with the Gravity Hammer on Midnight.
- You're No Chips
Halo 4: What do Marines know about sticks?
- A Long Time Ago
Halo 4: Play a game of Halo 4 on the 6th of any month.
- You're Joking
Halo 4: Complete all Halo 4 Legendary campaign missions in under 3 hours.
- Mortardom
Halo 4: On Reclaimer, use a Wraith to kill at least four enemy Wraiths on Heroic or Legendary.
- Digging up the Past
Halo 4: Access the Master Chief's records on Dawn.
- Naked Tyrant
Halo 4: Complete the Halo 4 LASO Campaign playlist.
Locked - 2 guides
- Devotee
Halo 4: Complete three Halo 4 playlists.
- Chest of Gold
Halo 4: Complete a Halo 4 playlist.
- Librarian's Gift
Halo 4: Complete every level of the game on Easy difficulty.
- Operation Completion
Halo 4: Complete a Spartan Ops mission.
- Departure
Halo 4: Complete all chapters in Spartan Ops Episode 1.
- Artifact
Halo 4: Complete all chapters in Spartan Ops Episode 2.
- Catherine
Halo 4: Complete all chapters in Spartan Ops Episode 3.
- Didact's Hand
Halo 4: Complete all chapters in Spartan Ops Episode 4.
- Memento Mori
Halo 4: Complete all chapters in Spartan Ops Episode 5.
- Scattered
Halo 4: Complete all chapters in Spartan Ops Episode 6.
- Invasion
Halo 4: Complete all chapters in Spartan Ops Episode 7.
- Expendable
Halo 4: Complete all chapters in Spartan Ops Episode 8.
- Key
Halo 4: Complete all chapters in Spartan Ops Episode 9.
- Exodus
Halo 4: Complete all chapters in Spartan Ops Episode 10.
- Feet First
Halo 4: Complete all Spartan Ops chapters.
- Term of Enlistment
Halo 4: Complete all Spartan Ops chapters on Normal difficulty.
- Hazard Pay
Halo 4: Complete all Spartan Ops chapters on Heroic difficulty.
- Icarus
Halo 4: Complete all Spartan Ops chapters on Legendary difficulty.
- Smooth Operator
Halo 4: Complete all Spartan Ops chapters solo on Legendary difficulty.
- Roses vs Violets
Halo 4: Why are you even here?
- No One Left Behind
Halo 4: Save at least one Marine on Hacksaw (Ep.2 Ch.3) of Spartan Ops on Heroic or Legendary.
- Knight in White Assassination
Halo 4: Assassinate a Knight in any Spartan Ops mission.
- What Power Outage?
Halo 4: Complete The Cauldron Base of Spartan Ops without losing a generator on Heroic or Legendary.
- No Easy Way Out
Halo 4: Survive Spartan Miller (Ep.5 Ch.1) of Spartan Ops on Heroic or Legendary.
- Going International
Halo 4: Complete a match on at least 8 different multiplayer maps.
- Taste Test
Halo 4: Complete a match on at least 4 different game types in multiplayer.