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

ME3: Explore a lost city.

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

ME3: Destroy an Atlas dropped from orbit.

ME3: Escape a Reaper in the galaxy map.

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

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

ME3: Chase down an assassin.

ME3: Evolve any of your powers to rank 6.

ME2: Keep your team alive through the suicide mission

ME2: Survive suicide mission

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

ME2: Obtain geth technology