Consume a PSI Pop to restore some mental energy

Deliver a successful Fatal Attack.

And that was just a beginning...

ME2: Save your crew from an overwhelming attack

ME1: Complete the majority of the game

Establish a romantic relationship in Mass Effect 1, 2 or 3

ME1: Use Charm or Intimidate to resolve an impossible situation

ME1: Accumulate 75% of total possible Paragon or Renegade points

Kill 250 enemies in Mass Effect 1, 2 or 3

ME1: Complete the Bring Down the Sky mission.

ME1: Locate Dr. T'soni in the Artemis Tau cluster

ME1: Complete 5 missions with the quarian squad member

ME1: Complete Eden Prime