Defeat an old adversary.

Send a warning across the galaxy.

Kill 1,000 enemies.

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

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

Escape a Reaper in the galaxy map.

Kill a brute while it's charging you.

Discover an enemy's monstrous origin.

Evacuate a scientific facility.

Evolve any of your powers to rank 6.

Defeat a Harvester.

Survive the swarm.

Set 100 enemies on fire with powers.