Hisomu's Heir
Kill one guard.
Awakened
Save Azai from the mercenaries.
The Mercenary
Assassinate Kelly, the mercenary captain.
Karajan's Fate
Assassinate Karajan.
Escape
Escape from the Stronghold.
Fated
Determine your fate.
True Ninja
Complete the game in New Game Plus.
Descendent of Iga
Earn three stars in every level.
Perfection
Earn all three seals in every level.
Haiku
Find all three scrolls in every level.
Marked
Earn all of the upgrades.
Mercy
Complete a level without killing any guards.
Masterful
Complete a level without getting detected.
Ghost
Complete a level without killing any guards and without being detected.
Of the Mind
Complete all of the challenge rooms.
Oni
Terrorize 10 guards.
Manipulator
Distract 25 guards using your equipment.
Trickster
Distract 25 guards using environmental objects.
Stealth Assassin
Perform 25 successful stealth kills.
Crimson Haiku
Perform five different types of stealth kills in one level.
Inner Heaven
Kill a guard from inside the box.
The Dark Project
Get the Undetected bonus 10 times in one level.
Things Better Left Unseen
Throw the body of one guard to terrorize another.
Tactical Espionage Action
Within a single Focus, aim and throw three different types of items.
No One Lives Forever
Stealth kill an elite guard after stunning him.
Deadly Shadows
Stealth kill a guard from inside a dumpster.
The Worst Allies
Kill a guard by getting other guards to shoot him.
Unstable Footing
Terrify a guard and cause him to stumble to his death.
Gallows
Terrify a guard with a hanging stealth kill five times.
Snare
Use a dead body to lure another guard and then stealth kill him.
Days Long Past
Complete Dosan's Tale.
The Humble Moth
Stun an elite guard with moths then dispatch him.
Behind the Curtain
View any of the developer commentaries.
Back to Bed With You
Knock out an enemy again that was revived from being knocked out.
What Could Have Been
Complete one of the original Mark of the Ninja levels using the Path of Wisdom.
Cordyceps
Dispatch two enemies at once using a body infected with Toxic Fungus.
Well, *I* Think It's Interesting
Read one of the history lesson developer commentaries.
Couldn't Do That before
Disable a spotlight using the Dusk Moths.