The Shadows Add-on for Endless Legend - Emperor Edition has 8 achievements.
With the Forgotten, steal 10 researches.
Capture 10 spies, across any number of playthroughs.
Pillage 30 buildings, across any number of playthroughs.
Win a game with the Forgotten.
With the Forgotten, be the first to reach the 2nd Era.
With a spy, return a governor to his owner's academy without being detected.
Get 500 Dust by pillage.
Perform 5 infiltration actions without leaving the infiltrated city.