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