ME3: Kill 10 guardians with headshots from the front while their shields are raised.

ME3: Win a political stand-off.

ME3: Perform any combination of 50 biotic combos or tech bursts.

ME3: Survive the swarm.

ME3: Lift 100 enemies off the ground with powers.

ME3: Dispatch 10 probes to retrieve people or resources in Reaper territory.

ME3: Stop a Cerberus kidnapping.

ME3: Bring a veteran officer aboard.

ME3: Chase down an assassin.

ME3: Return to active duty.

ME2: Acquire all trophies

Kill 100 enemies with melee attacks in Mass Effect 1, 2 or 3