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