That's a Knife

Performed an Assassination on an enemy.

Yes, Sensei

Earned a First Strike Medal in a Matchmaking game.

Send Me Out... with a Bang

Completed the 10th mission on Normal or harder.

Folks Need Heroes...

Completed the Campaign on Heroic difficulty.

The Soldier We Needed You To Be

Completed the Campaign on Normal difficulty.

This is Not Your Grave...

Completed the 9th mission on Normal or harder.

Dust and Echoes

Completed the 8th mission on Normal or harder.

I Didn't Train to Be a Pilot

Killed 3 of the anti-aircraft batteries during the 8th mission.

Into the Howling Dark

Completed the 7th mission on Normal or harder.

Make it Drizzle

Purchased an item from the Armory.

You Flew Pretty Good

Completed the 6th mission on Normal or harder.

To War

Completed the 5th mission on Normal or harder.

I Need a Weapon

Completed the 4th mission on Normal or harder.

I See You Favor a .45

Killed 10 enemies in a Firefight or Campaign session with the M6G pistol.

Protocol Dictates Action

Completed the 3rd mission on Normal or harder.

The Start of Something

Reached the rank of Corporal in the UNSC.

We're Just Getting Started

Completed the 2nd mission on Normal or harder.

An Elegant Weapon...

Killed 10 enemies in a Firefight or Campaign session with the DMR.

Doctor, Doctor

Used a Health Pack to replenish life after taking body damage.

Swap Meet

Traded weapons with an AI ally in Campaign.