Hijack an Atlas mech.

Send a warning across the galaxy.

Extract ancient technology.

Discover an enemy's monstrous origin.

Kill 1,000 enemies.

Complete three multiplayer matches or five N7 missions.

Perform any combination of 50 biotic combos or tech bursts.

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

Obtain two non-customizable suits of armor.

Kill 10 guardians with headshots from the front while their shields are raised.

Defeat a Harvester.

Start a character in multiplayer or customize a character in single-player.

Survive the swarm.