Discover a plot against you.

Rescue a civilian from Reaper forces.

Use clues to pinpoint the exact location of an objective.

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

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

Reach level 20 in multiplayer or level 60 in single-player.

Complete three multiplayer matches or five N7 missions.

Evacuate a scientific facility.

Complete all the Command Center side-missions on Omega.

Find the Talon leader.

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

Explore a lost city.