Kill one guard.
Save Azai from the mercenaries.
Assassinate Kelly, the mercenary captain.
Escape from the Stronghold.
Determine your fate.
Complete the game in New Game Plus.
Earn three stars in every level.
Earn all three seals in every level.
Find all three scrolls in every level.
Earn all of 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.
Distract 25 guards using environmental objects.
Perform 25 successful stealth kills.
Perform five different types of stealth kills in one level.
Kill a guard from inside the box.
Get the Undetected 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 an elite guard after stunning him.
Stealth kill a guard from inside a dumpster.
Kill a guard by getting other guards to shoot him.
Terrify a guard and cause him to stumble to his death.
Terrify a guard with a hanging stealth kill five times.
Use a dead body to lure another guard and then stealth kill him.
Complete Dosan's Tale.
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.