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