Kill a brute while it's charging you.

Defeat a Harvester.

Stop a Cerberus kidnapping.

Kill 10 guardians with headshots from the front while their shields are raised.

Bring a veteran officer aboard.

Visit a store in the single-player campaign.

Return to active duty.

Traveled to the world below, seeking a way to alter fate.

Took the fight to the enemy's door.

Made plans to infiltrate enemy-occupied territory.

Accepted a new fate in a world where everything has changed.

Slipped through the net and lived to fight another day.