Place a sticker or a decoration on another player's sackperson

Killed 15 enemies with the Berserker's action skill

Perform a cross for a friend who scores from it. (Co-op Trophy)

Successfully perfom a pass that switches the play from one flank to the other

Discovered Eridian Promontory

Completed all missions in the Rust Commons

Killed Flynt

Discovered Trash Coast

Earned level 30

Earned $1,000,000

Correctly answer three questions in a row in under 0.5 seconds

Killed 25 enemies with corrosive weapons

Emerged victorious from an arena match