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