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