Full list of all 73 Halo 5: Guardians achievements worth 1,250 gamerscore. It takes around 40-50 hours to unlock all of the achievements in the base game on Xbox One.
The base game contains 65 achievements worth 1,000 Gamerscore, and there are 2 DLC packs containing 8 achievements worth 250 Gamerscore.
- Castle Crasher
Complete 5 matchmade games of Strongholds.
- Off to the Races
Complete 5 matchmade games of Breakout.
- Flag Monger
Complete 5 matchmade games of Capture the Flag.
- Spartan Decimation
Complete 5 matchmade games of Slayer.
- Into the Fire
Complete Mission 1.
- Argent Moon
Complete Mission 2.
Find and claim a Skull.
Complete Mission 6.
- Together Again
Complete Mission 7.
Complete Mission 13.
- A New Dawn
Complete Mission 14.
Complete every Mission of the game on Normal difficulty.
- Heroes Rise
Complete every Mission of the game on Heroic difficulty.
- Forging a Legend
Complete every Mission of the game on Legendary difficulty.
- Conspiracy Theory
Find and claim one piece of Intel.
- Top of the Food Chain
Kill a Legendary Boss in Warzone.
- Hunt the Truth
Find and claim all Intel.
- Fire Drill
Finish Evacuation within 18:00 without dying on Heroic difficulty.
Find and claim all Skulls.
- Enemy of my Enemy
Help the Elite General charge the hill in Osiris on Heroic difficulty.
- I Thought I'd Lost You
Escape the Hunters in the lab and fight them in the hangar in Blue Team.
- On My Mark
Simultaneously assassinate two Elites in Blue Team co-op.
- Going the Distance
Complete Glassed without entering a vehicle.
- Shoot from the Hip
Complete Glassed without any players using Smart-Link.
- Waiting on You
Kill an enemy that's had its armor repaired in Unconfirmed.
Team up in a vehicle to kill 30 enemies in Unconfirmed co-op.
Keep 6 miners alive at the elevator in Evacuation on Heroic difficulty.
- Take a Hike
Traverse the canyon without a Phaeton in Reunion on Heroic difficulty.
- No Witnesses
Destroy the Phantom at the Covenant camp in Reunion on Heroic difficulty.
- No Knock Raid
Destroy 10 walls or floors in Swords of Sanghelios.
- Preying Mantis
Complete Swords of Sanghelios co-op with both Mantises on Heroic difficulty.
- Kraken Lackin'
Complete Enemy Lines without destroying a Kraken turret.
- Emergency Boarding Procedures
Escape the doomed Kraken by jumping onto a Phaeton piloted by a Spartan.
- Death from Above
Kill a Grunt and smash a grate with a Ground Pound in Battle of Sunaion.
- Worms Don't Surf
Knock two Hunters into the ocean during the Battle of Sunaion.
- Tank Still Beats Everything
Finish the 13th mission without losing the Scorpion on Legendary difficulty.
- Rolling Thunder
Operate four different vehicles at once in Mission 13 on Heroic difficulty.
Complete The Breaking on Legendary difficulty without the entire fireteam dying.
- Prison Break
Simultaneously kill two Wardens in The Breaking on Heroic difficulty.
- Icy Cool
Use a Ground Pound on an exterior power core in Guardians on Heroic difficulty.
- Double Stuff
Simultaneously destroy 2 cores in Guardians on Heroic difficulty.
- Lone Wolf
Complete every Mission of the game by yourself on Legendary difficulty.
- One for All
Complete any co-op Mission on Heroic difficulty.
- All for One
Complete every co-op Mission on Heroic difficulty.
- Civil War
Complete Mission 12.
- My Rules
Complete any Mission with 3+ Skulls active on Heroic difficulty.
- Valor Recognized
Qualify for a Competitive Skill Rating.
Complete Mission 3.
- Roots of the Earth
Complete Mission 4.
- Stolen Gauntlet
Complete Mission 5.
Complete Mission 8.
- Old Bones
Complete Mission 9.
Complete Mission 10.
Complete Mission 11.
Complete Mission 15.