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