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