Official Business

Halo 2: Beat the par score on Gravemind.

The Hype Is Real

Halo 2: Beat the par score on Uprising.

Scorched Earth

Halo 2: Beat the par score on High Charity.

Frequent Flyer Miles

Halo 2: Beat the par score on The Great Journey.

Arcade Owner

Halo 2: Beat the par score on every Halo 2 level.

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.

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.

Don't Make a Girl a Promise

Halo 2: Collect the Cortana toy in Gravemind.

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.

Warrior

Halo 2: Complete every level of the game on Normal difficulty.

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.

Six Pedals, Four Directions

Halo 2: Drive a Scorpion while playing as the Arbiter.

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.

THE Chips Dubbo?

Halo 2: Fight alongside the legendary Chips Dubbo and listen to his words.

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!

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.

E E E

Halo 2: View both signs in the level Metropolis.

Why So Serious

Halo 2: View the smiling face in the classic multiplayer map Coagulation.

Why Am I Here?

Halo 2: View this hidden message on the classic Beaver Creek map.

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.

Silent but Deadly

Halo 2: Kill 7 opponents from behind in a row without being spotted.

Demon

Halo 2: Complete any campaign level without dying on Normal or harder.

Go Ape Shiv

Halo 2: Kill an enraged, berserk Brute using melee.

Grand Theft Halo

Halo 2A MP: In one match, steal a total of 5 occupied vehicles from opponents.

Tour of Duty

Halo 2A MP: Complete a game in every one of the 6 updated Anniversary MP maps.

Double Down

Halo 2A MP: In Anniversary multiplayer, receive 2 or more Double Kill medals.

Warden

Halo 2 MP: In Classic or Anniversary matchmaking, stop the killing spree of another player.

Blown Out of the Sky

Halo 2A MP: Blow up the Banshee or Hornet in flight while piloted, with the Rocket Launcher.

Decorated Warrior

Halo 2A MP: Get awarded at least 10 different medals in one multiplayer game.

Ninja Redux

Halo 2A MP: Kill 5 people with melee from behind in Anniversary matchmaking.

Flaming Ninja Anniversary

Halo 2A MP: Kill an opponent that has the Ninja Redux achievement in Anniversary matchmaking.

Legend Slayer

Halo 2A MP: Kill an opponent that has the Legendary Anniversary achievement.

Back At It

Halo 2: Play a game of Halo 2 Anniversary on the 9th of any month.

Back for More

Halo 2: Complete the LASO campaign playlist.

Monopolized

Halo 2: Complete all Halo 2 Legendary campaign missions in under 3 hours.

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.

Waypoint

Halo 3: Beat the par time on The Ark.

Scarab Slide

Halo 3: Beat the par time on The Covenant.

Making History

Halo 3: Beat the par time on Cortana.

Go, Chief! Gun It!

Halo 3: Beat the par time on Halo.

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.

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: Famine

Halo 3: Find and claim the Famine Skull on Normal or harder.

Skulltaker Halo 3: Thunderstorm

Halo 3: Find and claim the Thunderstorm Skull on Normal or harder.

Skulltaker Halo 3: Tilt

Halo 3: Find and claim the Tilt 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.

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.

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.

Sounds Familiar

Halo 3: This stuff is your history!

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.

Delicious Brains

Kill 100 Flood.

Zombie Repeller

Kill 1000 Flood.