Complete chapter 2 of episode 1.

Complete Mutant Bash TV in the Campaign

Win a Race in the Campaign

Complete Ghost Hideout in the Campaign

Mission accomplished.

Defeat an old adversary.

Finish all multiplayer maps or all N7 missions in single-player.

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

Complete three multiplayer matches or five N7 missions.

Call down an orbital strike.

Disable a group of fighter squadrons.

Establish or rekindle a romantic relationship.