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