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