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The Friend Zone Play a Quick or Competitive Play game in a group with a friend.

Dust & Echoes Evolved Complete The Maw.

Greenhorn Complete the Campaign on Easy Difficulty.
100/100

Birth of a Spartan Complete the Campaign on Normal Difficulty.
100/100

Clean Lap On The Maw complete the warthog run without being forcibly ejected from your vehicle.

Food Critic Listen to the Thirsty Grunt talk about his eating habits.

No Rush Find all skulls and terminals in The Maw.
100/100

Captain’s Orders Complete Keyes.

Weird science Complete Meat Locker on any difficulty.

Every bullet counts Get 3 headshots with one bullet.

Cranial blowout! Get an unbroken 10-headshot streak.

Here comes the party! Use your Ultimate 125 times
125/125

Double Trouble Complete Two Betrayals.

Outpost Discoveries Find all skulls and terminals in Two Betrayals.
100/100

Protocol Dictates Action Complete The Library.

Timeless Tomes Find all skulls and terminals in The Library.
100/100

Making a Necklace Collect 22 Skulls.
100/100

Disarmed Dismember 100 Flood parts.
100/100

This Stuff is Your History Complete 343 Guilty Spark.

Proto Gravemind Find all skulls and terminals in 343 Guilty Spark.
100/100

Bad Gas Destroy 100 Grunt backpacks.
100/100

Control Alt Delete Complete Assault on the Control Room.

Plate Tectonics Break off 25 Hunter backplates.
100/100

Stowed in Snow Find all skulls and terminals in Assault on the Control Room.
100/100

Claims Adjuster Break off 50 Vehicle parts.
100/100

Bee Thirty Complete Silent Cartographer.

Buried Treasure Find all skulls and terminals in Silent Cartographer.
100/100

Infiltration Anticipation Complete Truth and Reconciliation.

Make Them Count Kill 100 enemies with headshots.
100/100

Installation 04 Complete Halo.

Successful Search Find all skulls and terminals in Halo.
100/100

The Autumn Leaves Complete Pillar of Autumn.

Cranial Collect a Skull.

A Bit Quirky At Night Complete Five Nights At Freddy's

For the Greater Good Complete Hot Fuzz

I Don't Think They Exist In TranZit, kill one of the denizens of the forest while it is latched onto you.

Fine Dining Cook a bug on the Roasting Spit

Environmentally conscious Recycle 50 cans
50/50

Little Lost Girl In Origins, release Samantha.

Smile! Complete Jaws

Funk you, I won't do what you tell me! Break the rules by standing on the forbidden rocks in Jaws

Yeah Boy! Complete Shaun of the Dead

Overachiever In Origins, complete all 4 Challenges in one game.

Not a Gold Digger In Origins, share a weapon you dug up.

Master Wizard In Origins, wield all of the ultimate staffs in one game.

I’m on a Tank! In Origins, ride the tank around the map without getting off.

Playing with Power In Origins, build all elemental staffs in one game.

All Your Base In Origins, activate all generators without allowing one to stop.

Ready For Deployment Reach rank 10 in Combat Training.

Never get off the boat Find the Soviet connection in Laos.