Complete the investigation of a derelict alien vessel

Shoot and kill 20 enemies while they're knocked back by a punch

Defend a human colony from attack

Gain the loyalty of the thief

Kill enemies with 5 different heavy weapons during the game

Incinerate the armor of 25 enemies

Disrupt the shields of 25 enemies

Gain the loyalty of the mercenary ("Cerberus Pack" downloadable content)

Complete a mission discovered by scanning an unexplored world

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

Retrieve mineral resources by scanning and probing a planet in the galaxy map

Successfully recruit the Professor

Make 20 enemies scream as they fall or are set on fire