Eld Aficionado
Not unlocked yetScan a Forerunner Artifact.
Haruspis
Not unlocked yetScan all seven Forerunner Artifacts.
Headstrong
Not unlocked yetDiscover your first hidden Skull.
Catacomb
Not unlocked yetDiscover all hidden Skulls.
Please Shut Up
Not unlocked yetTake out a Banished Propaganda Tower.
Off the Air
Not unlocked yetDestroy 40 Banished Propaganda Towers.
Gun Runner
Not unlocked yetTake down all three Banished AA guns.
Forza Veloce
Not unlocked yetComplete all 14 main missions in under eight hours.
Passing the Gas
Not unlocked yetKill a Grunt that's been thrown by a Brute.
Nosebleed
Not unlocked yetCheck out the best possible view.
Those Wonderful Toys
Not unlocked yetSuccessfully use the Grappleshot 50 times.
Aegis Fate
Not unlocked yetDeploy the Drop Wall 50 times.
All-Seeing I
Not unlocked yetUse the Threat Sensor 50 times.
Run Rabbit, Run
Not unlocked yetUse the Thruster 50 times.
Whip-Riding the Ghost
Not unlocked yetUse the Grappleshot to board an enemy Ghost.
Wait, I Can Throw Those?
Not unlocked yetThrow 50 fusion coils.
Bring Shiela Home Safely
Not unlocked yetGet the Scorpion all the way to the "House" without it blowing up.
Takes One to Make One
Not unlocked yetSplatter an enemy with a Ghost.
Wars with Friends
Not unlocked yetBring some rescued UNSC Marines along for the ride into a main mission.
Wanna Have a Catch?
Not unlocked yetStick 50 enemies with grenades.
A True Test of Legends
Not unlocked yetComplete all main campaign missions on Legendary difficulty.
Which One of Us is the Machine?
Unlocked atGet and equip a new AI.
Passion for Fashion
Unlocked atWear a new armor customization item.
"Need a Weapon?"
Unlocked atTry out a new weapon customization item.