Establish or rekindle a romantic relationship.

Dispatch 10 probes to retrieve people or resources in Reaper territory.

Call down an orbital strike.

Reach level 15 in multiplayer or level 50 in single-player.

Discover an enemy's monstrous origin.

Killed Ned. Again.

Completed the "Jakobs Fodder" mission

Explore a lost city.

Defeat a Harvester.

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

Stop a Cerberus kidnapping.

Evolve any of your powers to rank 6.

Kill a brute while it's charging you.