Make the final assault.

Defeat an old adversary.

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

Deliver most of the Galaxy at War assets to the final conflict.

Complete three multiplayer matches or five N7 missions.

Sabotage a dreadnought.

Rescue a civilian from Reaper forces.

Evacuate a scientific facility.

Discover an enemy's monstrous origin.

Win a political stand-off.

Kill a brute while it's charging you.

Complete Sequence 7.