Get a scoped headshot over 150m

Mission accomplished.

Kill 1,000 enemies.

Defeat an old adversary.

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

Extract ancient technology.

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

Perform any combination of 50 biotic combos or tech bursts.

Sabotage a dreadnought.

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

Evacuate a scientific facility.

Complete one multiplayer match or two N7 missions.