View any of the developer commentaries.
Assassinate Karajan.
Stealth kill an elite guard after stunning him.
Terrify a guard and cause him to stumble to his death.
Terrify a guard using the result of a hanging stealth kill five times.
Complete a level without killing any guards.
Complete a level without getting detected.
Complete a level without killing any guards and without being detected.
Terrorize 10 guards.
Stealth kill a guard from inside a dumpster.
Assassinate Kelly, the mercenary captain.
Throw the body of one guard to terrorize another.
Kill a guard by getting other guards to shoot them.
Perform five different types of stealth kills successfully in one level.
Use a dead body to lure another guard and then stealth kill them.
Distract 25 guards using environmental objects.
Perform 25 successful stealth kills.
Save Azai from the mercenaries.
Kill one guard.
Escape from the Stronghold.
Determine your fate.
Complete the game in New Game Plus.
Earn three stars in every level.
Earn all the Seals in every level.
Find all three scrolls in every level.
Earn all the upgrades.
Complete all of the challenge rooms.
Distract 25 guards using your equipment.
Kill a guard from inside the box.
Get the Undetected honor bonus 10 times in one level.
Within a single Focus, aim and throw three different types of items.
Complete the new Special Edition level.
Stun an elite guard with moths then dispatch him.
Knock out an enemy again that was revived from being knocked out.
Complete one of the original Mark of the Ninja levels using the Path of Wisdom.
Dispatch two enemies at once using a body infected with Toxic Fungus.
Read one of the history lesson developer commentaries.
Disable a spotlight using the Dusk Moths.
1210262
16593
213
892
687
160
36
9