Use every gun in the game

Find 35 treasures

Stealth take-down 15 enemies in a row

Open every lockbox

Defeat 4 enemies with the same explosion (all explosive items and weapons apply)

Pull 20 enemies over when hanging from a ledge

Just prior to City Chase, stand perfectly still for 30 seconds (stage demo fail)

Hit all targets in the attic with the toy gun

Beat the best score in the retro videogame

Destroy 10 vehicles while being dragged from the rope

Defeat 50 enemies from-the-hip or blind-firing

Play in the ocean near the sunken ship