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