Full list of all 38 Mark of the Ninja achievements. It takes around 20-25 hours to unlock all of the achievements in the base game on Windows.
The base game contains 30 achievements, and there is 1 DLC pack containing 8 achievements.
Terrify a guard using the result of a hanging stealth kill five times.
Stealth kill a guard from inside a dumpster.
Kill a guard from inside the box.
Complete the game in New Game Plus.
Distract 25 guards using your equipment.
Earn all the upgrades.
Earn three stars in every level.
Find all three scrolls in every level.
Determine your fate.
Complete a level without killing any guards and without being detected.
Earn all the Seals in every level.
Complete all of the challenge rooms.
Escape from the Stronghold.
Assassinate Karajan.
Stealth kill an elite guard after stunning him.
Terrify a guard and cause him to stumble to his death.
Complete a level without getting detected.
Get the Undetected honor bonus 10 times in one level.
Within a single Focus, aim and throw three different types of items.
Complete a level without killing any guards.
Assassinate Kelly, the mercenary captain.
Use a dead body to lure another guard and then stealth kill them.
Terrorize 10 guards.
Distract 25 guards using environmental objects.
Perform five different types of stealth kills successfully in one level.
Kill a guard by getting other guards to shoot them.
Perform 25 successful stealth kills.
Save Azai from the mercenaries.
Throw the body of one guard to terrorize another.
Kill one guard.
Read one of the history lesson developer commentaries.
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.
Stun an elite guard with moths then dispatch him.
Disable a spotlight using the Dusk Moths.
Complete the new Special Edition level.
Knock out an enemy again that was revived from being knocked out.
View any of the developer commentaries.