The Special Edition DLC Add-on for Mark of the Ninja has 8 achievements.
Complete one of the original Mark of the Ninja levels using the Path of Wisdom.
Disable a spotlight using the Dusk Moths.
Read one of the history lesson developer commentaries.
Dispatch two enemies at once using a body infected with Toxic Fungus.
Stun an elite guard with moths then dispatch him.
Complete the new Special Edition level.
Knock out an enemy again that was revived from being knocked out.
View any of the developer commentaries.