There are 50 achievements for the Xbox 360 and 51 trophies for the PlayStation 3, including 21 secret achievements and trophies.
Dark Athena added achievements for the Xbox 360, which also covers content across Escape from Butcher Bay. In-game, they are called accomplishments.
This game includes multiplayer achievements. to obtain some of these achievements, you need to complete several tasks, although not necessarily within the same match or round.