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.
Earn all the upgrades.
Find all three scrolls in every level.
Terrify a guard and cause him to stumble to his death.
Earn all the Seals in every level.
Complete the game in New Game Plus.
Earn three stars in every level.
Complete all of the challenge rooms.
Kill a guard from inside the box.
Determine your fate.
Escape from the Stronghold.
Assassinate Karajan.
Distract 25 guards using your equipment.
Terrorize 10 guards.
Stealth kill an elite guard after stunning him.
Throw the body of one guard to terrorize another.
Stealth kill a guard from inside a dumpster.
Assassinate Kelly, the mercenary captain.
Perform 25 successful stealth kills.
Use a dead body to lure another guard and then stealth kill them.
Perform five different types of stealth kills successfully in one level.
Within a single Focus, aim and throw three different types of items.
Kill a guard by getting other guards to shoot them.
Complete a level without killing any guards and without being detected.
Distract 25 guards using environmental objects.
Complete a level without killing any guards.
Get the Undetected honor bonus 10 times in one level.
Complete a level without getting detected.
Save Azai from the mercenaries.
Kill one guard.
Complete the new Special Edition level.
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.