Harbinger (achievement)

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Harbinger is an achievement in Halo 5: Guardians, awarded for keeping Blue Team alive during the level The Breaking on Legendary difficulty.[1]


The achievement does not require that all of Blue Team never die; at least one member never dying is enough to grant it. The achievement will not be awarded until the level is fully completed, including the cutscenes, meaning it will be granted at the start of Guardians.

While possible on solo, it is best done on co-op for communication with one's teammates. Should three of the four characters of Blue Team be downed, the surviving character must fall back to a safe place to allow the other players to respawn as quickly as possible. The enemies to watch out for are Soldier Captains with Splinter Turrets, Soldier Snipers with Binary Rifles, and Promethean Knights (especially Knight Commanders) with Incineration Cannons, as the latter two enemies can instantly kill a character and make him/her unrevivable until next respawn, while Soldier Captains cannot instantly kill a character and make him/her unrevivable but are otherwise extremely dangerous with their Splinter Turrets.

Upon reaching the triple Warden Eternal boss fight at the end of the level, it is actually possible to skip it by taking one of the man cannons in the arena, boosting towards the platform that actually leads to Cortana, and then doing a ground pound onto the platform, clambering onto it, and simply running to the room at the end. This still unlocks the achievement, so long as at least one player stays alive during the entire level.

The following criteria will block this achievement from being unlocked:

  • Dying on solo
  • With 2 or 3 players, all 2 or 3 players dying (regardless of whether or not the remaining NPC teammates are alive).
  • Reverting to last checkpoint (regardless of whether or not the Iron skull is on)
  • Using Score Attack (this disables both of the mission's cutscenes)


Achievements in Halo 5: Guardians
Campaign Into the FireArgent MoonGlasslandsRoots of the EarthStolen GauntletEscapeTogether AgainSwordsOld BonesBreakthroughStormboundCivil WarReclamationA New DawnSentinelsLegacyHeroes RiseForging a LegendLone WolfMy RulesConspiracy TheoryHunt the TruthGravediggerGravelord
Co-op One for AllAll for OneOn My MarkMaverickPreying Mantis
Level-specific Your Team is Your WeaponEnemy of my EnemyI Thought I'd Lost YouGoing the DistanceShoot from the HipWaiting on YouSaviorFire DrillTake a HikeNo WitnessesNo Knock RaidKraken Lackin'Emergency Boarding ProceduresDeath from AboveWorms Don't SurfTank Still Beats EverythingRolling ThunderHarbingerPrison BreakIcy CoolDouble Stuff
Multiplayer Cry HavocTop of the Food ChainWarlordCastle CrasherOff to the RacesFlag MongerSpartan DecimationValor RecognizedYour StyleRaise Your BannerMake Your MarkGamemasterBenchwarmerDrop A QuarterUp For A ChallengeParty HeartyThe HareThe TortoiseNot Your First RodeoTour of DutyDangerous Game
Requisition Bringing in the Big GunsGo for the Gold