Defeat an old adversary.

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

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

Evacuate a scientific facility.

Complete three multiplayer matches or five N7 missions.

Overload the shields of 100 enemies.

Disable a group of fighter squadrons.

Survive the swarm.

Win a political stand-off.

Complete one multiplayer match or two N7 missions.

Set 100 enemies on fire with powers.

Defeat a Harvester.