Full list of all 40 Glass Masquerade 2: Illusions achievements. It takes around 20-25 hours to unlock all of the achievements in the base game on Windows.
The base game contains 39 achievements, and there is 1 DLC pack containing 1 achievements.
Complete 4th arm of the illusions map on a high difficulty mode
Complete 3rd arm of the illusions map on a high difficulty mode
Complete 2nd arm of the illusions map on a high difficulty mode
Complete all puzzles on any difficulty
Complete this puzzle on any difficulty
Complete 5th arm of the illusions map on a high difficulty mode
Complete 1st arm of the illusions map on a high difficulty mode
Complete free demo puzzle in Revelations DLC
Complete free demo puzzle in Temptations DLC