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