You Evaded (or defeated via Takedown moves) 75 enemies.

Use a knife to remove a bullet

Gain Liked reputation status of 3 people (who must all Like you at the same time).

Defeat 50 enemies with CQC.

Pick 10 locks.

Attended an audience with the duke.

Entered the Soulflayer Canyon.

Received a writ from the castle.

Entered the ancient quarry.

Entered Gran Soren.

Use clues to pinpoint the exact location of an objective.

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