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Official Business is an achievement in Halo: The Master Chief Collection. This achievement is obtained when a player beats the par score on the level Gravemind.

Achievements in Halo: The Master Chief Collection

Campaign

Balaho's Most Wanted • Bro Hammer • Brovershield • Checkmate • Dankey Kang • Delicious Brains • Dogcatcher • Going Bananas • Gruntageddon • Hunters Hunted • I Dabble in Slaying • I Was Wondering What Would Break First • Knightbane • LASO Master • Legend • Life Story • Lore Master • Mystery Achievement • Pest Control • Remove the Bishops From the Board • Sample Plate • Scavenger Hunt • Spoilsport • Standard Operating Brocedure • The Guardians Are Coming • The One Percent • Throne of Bones • Veteran • War Hero • Were It So Easy • Wyrmslayer • Zombie Repeller

Gameplay

Just a Taste • All Out of Bubblegum • A Pile of Medals • A Crate of Medals • A Heap of Medals • A Few Trinkets • Oh, These Baubles? • Chesty Puller Starter Kit • Medal Master Chief • The Good, The Bad, and The Dead • Medal Completionist • Your Journey Begins • Where Am I? • Game On • I Got This • Can't Put It Down • Bonus Level • Up All Night • Can't Get Enough • Committed • Big Time Gamer • Long Time Fan • The Long Haul • Just Getting Started • Foe Hammer • Thanks A Killion • Tempered Blade • Contender • Forged in Fire • Sharpshooter • In It To Win It • Battle Hardened • Thermopylae • Striking Fear in Their Hearts • Steady Aim • Quick Trigger Finger • Multiplayer Champion

v d e Halo: Combat Evolved

Campaign levels	Pillar of Autumn • Halo • Truth and Reconciliation • The Silent Cartographer • Assault on the Control Room • 343 Guilty Spark • The Library • Two Betrayals • Keyes • The Maw

Par Scores	Pillar of Awesome • Giant Hula Hoop • You Really Can't Handle the Truth • Charted • Vetro Strike • Circuit Breaker • Reading Room • It Was Inevitable • Headstrong • Consumption Junction • Overachiever

Par Times	Didn't Like This Ship Anyways • Flyover Country • You Can't Handle the Truth • Hit The Beach • Would It've Killed You To Take The Elevator • Lightning in a Bottle • TLDR • Whistle Stop Tour • Scurty Bump • All You Can Eat • Did Somebody Say...

Terminals	Arrival • Sacrifice • Splinters • Idle Hands • Hitchhikers May Be Escaping Convicts • Bearly Contained • Quis custodiet ipsos custodes? • Memories • Mind Games • Kilotons of Fun • Dear Diary…

Skulls	Iron • Mythic • Boom • Foreign • Famine • Bandana • Fog • Malfunction • Recession • Black Eye • Eye Patch • Piñata • Grunt Birthday Party • Headhunter

Campaign level completion	Birth of a Spartan • Believe in a Hero • Living Legend • Overshields are for Sissies • Walk it Off • How Pedestrian • That Just Happened • Look Out for the Little Guys • Leave It Where It Lay • Tying Up Loose Ends

Playlists	A Fine Choice • Excellent Taste • Like a Fine Wine

Miscellaneous	You Are The Weapon • Madrigal Debut • My Buddy Chips • No Smoking • T-Rex • Thirsty Grunt • Megg • Get Me Out of Here! • Feet Firmly Planted • Before and After • He's Unstoppable! • A Day To Remember • Back In The Day • Pacifist • Wraith Hunter • Close Quarters Combat • This Side Up • All According to Plan… • Beachhead • No-Fly Zone • Greenhorn

v d e Halo 2

Campaign levels	Cairo Station • Outskirts • Metropolis • The Arbiter • Oracle • Delta Halo • Regret • Sacred Icon • Quarantine Zone • Gravemind • Uprising • High Charity • The Great Journey

Par Scores	Bomb Squad • Objective Secured • Ripple Fire • Heresy Will Not Stay My Feet • Leave None Alive • Boundless • Fists of Fury • Guided Tour • The Doctor Is In • Official Business • The Hype Is Real • Scorched Earth • Frequent Flyer Miles • Arcade Owner

Par Times	Don't Hangar Around • Rooftop Runner • Speeding Ticket • YOLO Strats • Reed the Strategy • So You Don't Want the Tank? • I Regret Nothing • Terminal Velocity • Hot Zone • Force of Will • No Man's Land • Feeling Charitable • Are We There Yet? • Going Nowhere Fast

Terminals	Curious • Inquisitive • Examiner • Inspector • Fascinated • Enchanted • Enamored • Determined • Delighted • Knowledgable • Scholar • Reviewer • Obsessed • Walking Encyclopedia

Skulls	That's Just…Wrong • Thunderstorm • Blind • IWHBYD • Catch • Grunt Birthday Party • Famine • Envy • Assassins • Mythic • Sputnik • Anger • Ghost • Iron • Black Eye • Trophy Collector

Toys	And So It Begins... • Regrettable Turn of Events • The Will of the Prophets • Chieftain of the Brutes • Don't Make a Girl a Promise • My Work is Done • I Like Crazy • Pyrrhic Solution • Toybox

Campaign level complete	Warrior • Hero • Legendary Anniversary • Needs More Whammy Bar • Like Peanut Butter and Chocolate • Starved For Shields • Commuter • He Never Gets Me Anything • Demon • He's Running a Marathon... • Tighten Up The Graphics • Big Green Style

Playlists	Seconds • Connoisseur • Back for More

Miscellaneous	Six Pedals, Four Directions • Betcha can't stick it... • Cowardly Grunt • Siege of Ivory Tower • THE Chips Dubbo? • Rex Sword • 10 Minutes Too Early • HI BEN • E E E • GOOOAAAAALLLL! • Scarab Lord • Silent But Deadly • Go Ape Shiv • Back At It • The Return of Megg • Dirty Bird • Monumental Thirst!

v d e Halo 3

Campaign levels	Landfall • Holdout • The Road • Assault • Cleansing • Refuge • Last Stand • The Key • Return

Par Scores	Guerilla • King of the Crows • Cavalier • Askar • Exterminator • Ranger • Vanguard • Orpheus • Torchbearer • Better With Age

Par Times	Speedy One One Seven • Time Shift • Highway Robbery • Lightning Strike • Dambuster • Waypoint • Scarab Slide • Making History • Go, Chief! Gun It! • Speed Demon

Terminals	Rising Waters • Inundation • Before the Fire • Tipping Point • Unto Dust • Babbling Dead • Sword and Shield • The Coin's Fault • Whispers Across the Galaxy • No Stone Unturned

Skulls	Iron • Black Eye • Tough Luck • Catch • Fog • Famine • Thunderstorm • Tilt • Mythic • Blind • Grunt Birthday Party • Cowbell • IWHBYD • Witch Doctor

Campaign level complete	Prophet's Bane • With Your Shield or On It • Finished the Fight • Begins with a Single Step • Who Needs Them? • Annual

Playlists	A Preference for Pain • Afficiando • Boot Camp Hero

Miscellaneous	Phantom Hunter • Dirge of Madrigal • Primate • Haplorrhini • Can't Keep Him Down • Flipyap • Heading to his Destiny • Sounds Familiar • Milk Carton • Cool Story Bro • Third Time's A Charm • Mind the Gap • Missing Link

v d e Halo 4

Campaign levels	Dawn • Requiem • Forerunner • Infinity • Reclaimer • Shutdown • Composer • Midnight

Par Scores	Gunslinger • Dark Fortress • Shadow of Sundered Star • Jungle Warfare • Librarian's Pet • Emergency Shutdown • Head Banging • Witching Hour • You Had it Coming

Par Times	Piece of Cake • Interloper • Raging in the Dark • Ouroboros • Gimme That • Shut. Down. Everything. • Symphony of Pain • Countdown • Easy as One Two Three

Terminals	War • Lord of Admirals • Charum Hakkor • Flood • Knights • Justice • Cryptum • Terminus

Campaign level complete	Librarian's Gift • Wake Up, John • I Need a Hero • The Legend of 117 • Lone Wolf Legend • This is my Rifle, this is my Gun • Bros to the Close

Playlists	Naked Tyrant • Devotee • Chest of Gold

Miscellaneous	Explore the Floor • Give Him the Stick • Chief, Smash! • You're No Chips • A Long Time Ago • Mortardom • Digging up the Past

v d e Title Update 1 (Halo MCC)

Halo 2A Matchmaking	Grand Theft Halo • Tour of Duty • Double Down • Warden • Blown Out of the Sky • Decorated Warrior • Ninja Redux • Flaming Ninja Anniversary • Legend Slayer • Eminent Domain • Gate Your Thirst! • High Altitude Thirst! • Invaders Repelled • Power Play • Put Up Your Dukes • Red vs. Blue • Rule Your Thirst! • Shields Up! • Shook the Hornet's Nest • Skeet Shooter • Stayin' Alive • The Goose is Loose • Thirst Locked Down! • Top Gungoose • BLASTacular! • Bloody Thirsty! • Bombing Run • Cold as Ice • Cold Fusion • Counter-Sniped • Triple Threat • Wetwork • Worship Your Thirst! • Zealot • MVP

Additional matchmaking	Bite the Hand • Animal Habitat • Sid Graffiti • Destination Vacation

Campaign	Goat Roped • Monopolized • Devastating • You're Joking

Miscellaneous	Why So Serious • Why Am I Here? • Hippo Hero • Man on the Moon • Elder Signs • Game Master • Master Forger

v d e Title Update 2 (Halo MCC)

Spartan Ops complete	Operation Completion • Departure • Artifact • Catherine • Didact's Hand • Memento Mori • Scattered • Invasion • Expendable • Key • Exodus • Feet First • Term of Enlistment • Hazard Pay • Icarus • Smooth Operator

Additional Spartan Ops	Roses vs Violets • Knight in White Assassination • What Power Outage? • No Easy Way Out

Campaign	No One Left Behind • No Pain, No Gain

Multiplayer	Nice Work Dawg! • Aim for the Head • Dim Mak • Domination • Double Trouble • Spree Master • Catch This • Party Pooper • Planting A Flag • The True King • Roadkill Rampage • Rock and Coil Hit Back • Sightseeing • Checking Out Your Options • Tourist • Window Shopping • World Traveler • Just Browsing • Going International • Taste Test

Multiplayer Skulls	Assembly Skull • Orbital Skull • Sandbox Skull • Citadel Skull • Heretic Skull • Longshore Skull • Brainpan

Miscellaneous	Airborne

v d e Halo 3: ODST

Campaign levels	Tayari Plaza • Uplift Reserve • Kizingo Boulevard • ONI Alpha Site • NMPD HQ • Kikowani Station • Data Hive • Coastal Highway

Campaign complete	Rookie • Urban Warfare Badge • First In, Last Out • Mean Streets of New Mombasa • Déjà Vu • Classic • One Way Ride • Just Sayin...I Ain't Dead • Deference of Darkness • Those Left Behind • Shoot and Scoot • Xenophobia

Audio Logs	Listener • An Ear Full • Tuned In • Do Tell • Hear Me Out • Eavesdropping • Auditor • Overheard • Wiretapping • Monitored • Hang Onto My Words • Give Heed • Get A Load • Snoop Troop • All Ears • Ear Bender • Plugged In • Attentive • Watchful • Observant • Scout • Adventurer • Spotter • Considerate • On Your Toes • Archivist • Your Attention Please • Catching On • Wisening Up • Audiophile • Record Store Owner

Par Scores	Survey Says... • Don't Strain Your Metaphors • Son of a Gun • I Love My Job • Pour It On • Squid Jackpot! • Magic Touch • This Oliphant Has No Brakes • The Marine Corps Gives Its Regards

Par Times	Bill Past Due • Floor It! • An Artist's Canvas • A Pleasant Trip • First Stop: Anywhere But Here! • Feet Don't Fail Me Now • Overtaken By Events • Double Time! • Can't Stop Here, This is Brute Country

Clues	Junior Detective • Investigator • Gumshoe • Bloodhound • Private Eye • Secret Agent

Playlists	Safety Not Guaranteed • Trifecta • NEXT! • Nagato Makes Moving Easy

Miscellaneous	Naughty Naughty • Well...Maybe One or Two • Do You Remember When We Met • One Got Away • Like a Broken Record • Vandalized • Saturday Morning Cartoon • Catch 'Em Napping • Strong, Silent Type • Bip! Bap! BAM! • Pineapple Express • Fowl Hunt • Does Whatever a Spartan Can? • Firefly • "BLAM" Said The Lady! • Fast and Low • Shiny... • Bits and Pieces • What About Those Tanks? • Two Places, Same Time

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