Kill five enemies in a row with a single punch, after softening them up with gunfire

Kill 100 enemies with headshots

Kill 20 enemies with a brutal combo

Kill five enemies in a row with a brutal combo

You unlocked the special ability of Packie's car bomb placement.

You finished the story in less than 30 hours.

You completed the mission "That Special Someone".

You unlocked the special ability of Roman's taxi.

You completed all 9 assassin missions.

You completed the mission "Museum Piece".

You successfully lost a 4 star wanted rating.

You caught 20 criminals through the police computer.