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