Kill 50 Spetznaz. (Single Player)

Get Jack to the bar in one piece

Leap over and kick an enemy from cover

Take a GAC hostage

Kill an enemy by knocking or throwing him off a ledge

Combine Jack and Shadow to kill 20 enemies in any level, on OFFICER or greater difficulty.

Perform a Shadow groin takedown

Complete the game on OFFICER difficulty

Perform 3 kill moves in a row. (Single Player)

Complete Chapter 4 on any difficulty setting (Story Mode).

Mark of the Adept - Kill 5 UFOs in the Prologue

Complete KATN.