ME3: Sabotage a dreadnought.

ME3: Discover an enemy's monstrous origin.

ME3: Hijack an Atlas mech.

ME3: Win a political stand-off.

ME3: Kill a brute while it's charging you.

ME3: Survive the swarm.

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

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

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

ME3: Bring a veteran officer aboard.

ME3: Visit a store on the Citadel.

ME3: Modify a weapon.

ME3: Return to active duty.