ME3: Modify a weapon.

ME3: Chase down an assassin.

ME3: Evolve any of your powers to rank 6.

ME2: Acquire all trophies

ME2: Survive suicide mission

ME2: Use the Omega 4 Relay

ME2: Obtain geth technology

ME2: Gain the loyalty of the biotic Convict

ME2: Hit 20 different targets with multiple biotic powers to combine the effects

ME2: Thresher Maw defeated

ME2: Gain the loyalty of the Professor

ME2: Help the Justicar resolve her mission

ME2: Gain the loyalty of the quarian