Full list of all 38 Mark of the Ninja achievements worth 500 gamerscore. It takes around 10-12 hours to unlock all of the achievements in the base game.
The base game contains 30 achievements worth 400 Gamerscore, and there is 1 DLC pack containing 8 achievements worth 100 Gamerscore.
Complete the game in New Game Plus.
Determine your fate.
Earn all the upgrades.
Earn three stars in every level.
Earn all the Seals in every level.
Find all three scrolls in every level.
Complete all of the challenge rooms.
Kill a guard from inside the box.
Escape from the Stronghold.
Terrify a guard and cause him to stumble to his death.
Assassinate Karajan.
Stealth kill an elite guard after stunning him.
Get the Undetected honor bonus 10 times in one level.
Distract 25 guards using your equipment.
Terrify a guard using the result of a hanging stealth kill five times.
Within a single Focus, aim and throw three different types of items.
Terrorize 10 guards.
Stealth kill a guard from inside a dumpster.
Assassinate Kelly, the mercenary captain.
Use a dead body to lure another guard and then stealth kill them.
Complete a level without killing any guards.
Complete a level without killing any guards and without being detected.
Perform five different types of stealth kills successfully in one level.
Kill a guard by getting other guards to shoot them.
Throw the body of one guard to terrorize another.
Distract 25 guards using environmental objects.
Perform 25 successful stealth kills.
Complete a level without getting detected.
Save Azai from the mercenaries.
Kill one guard.
Read one of the history lesson developer commentaries.
Stun an elite guard with moths then dispatch him.
Complete one of the original Mark of the Ninja levels using the Path of Wisdom.
Disable a spotlight using the Dusk Moths.
Complete the new Special Edition level.
Dispatch two enemies at once using a body infected with Toxic Fungus.
Knock out an enemy again that was revived from being knocked out.
View any of the developer commentaries.