Sheepinate a Blarg Helicopter Commander.

After being marooned, leave everyone alive until the Treasury

Defeat enemies with a stealth attack, melee attack, headshot, and explosives, in that order, in 15 seconds

Perform 20 headshots from the rope

Complete all trials on Moderate (difficulty) in Multiplayer

Revive 10 Allies in Multiplayer

Complete the Uncharted Multiplayer Introduction

Complete the game in hard mode

Make 10 enemies drop their grenades

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

Defeat 1000 enemies

Climb to the very top of the Clocktower in the City

Pull 20 enemies over when hanging from a ledge