Mission accomplished.

Defeat an old adversary.

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

Call down an orbital strike.

Complete three multiplayer matches or five N7 missions.

Kill 100 enemies with melee attacks.

Kill 1,000 enemies.

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

Win a political stand-off.

Defeat a Harvester.

Complete one multiplayer match or two N7 missions.

Destroy an Atlas dropped from orbit.

Stop a Cerberus kidnapping.