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