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