Earth is under attack by a monstrous race of gigantic living ships known as the Reapers. Even if Commander Shepard could unite all surviving species in the universe, only a miracle can help. Then again, Shepard did come back from the dead.
Did You Know?
At one point in the game, Tali mentions that Shepard "sounds like a Vorcha." Mark Meer, who voices the male Shepard, also provides the voice for the Vorcha characters in the game. See more
It's stated in Mass Effect 1, as a major story of the Mass Effect 1 game, that the Citadel is a giant mass relay used by the Reapers as an entry point to the galaxy and that the Keepers of the Citadel are altered by the Protheans so they ignore the Reapers control signals, making their return impossible. However by the end of Mass Effect 3 the player learns that the Catalyst, who controls the Reapers and also the Keepers (who at this point in game are serving the Catalyst in processing the human bodies) is housed on the Citadel itself. That revelation makes the existence of Mass Effect 1 plot useless. See more
Commander Shepard - Male
Everytime we've talked about this before, you defended the genophage! Hell, I had to talk you into saving Maelon's data! How could you change your mind now?
I MADE A MISTAKE!
[calms down, realizes what he just confessed
...I made a mistake.