Perform five different types of stealth kills successfully in one level.
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 a level without killing any guards.
Complete a level without getting detected.
Complete a level without killing any guards and without being detected.
Complete all of the challenge rooms.
Terrorize 10 guards.
Distract 25 guards using your equipment.
Kill a guard from inside the box.
Get the Undetected honor bonus 10 times in one level.
Throw the body of one guard to terrorize another.
Within a single Focus, aim and throw three different types of items.
Stealth kill a guard from inside a dumpster.
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 the new Special Edition level.
Stun an elite guard with moths then dispatch him.
View any of the developer commentaries.
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.
Determine your fate.
Escape from the Stronghold.
Assassinate Karajan.
Stealth kill an elite guard after stunning him.
Kill a guard by getting other guards to shoot them.
Assassinate Kelly, the mercenary captain.
Perform 25 successful stealth kills.
Distract 25 guards using environmental objects.
Save Azai from the mercenaries.
Use a dead body to lure another guard and then stealth kill them.
Kill one guard.
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