Here is the full list of all 10 Enigma Manor achievements.
Finish the game on Casual difficulty or higher.
Finish the game on Standard difficulty or higher.
Finish the game on Hardcore difficulty or higher,
Finish the game on Nightmare difficulty.
Achieve an S+ ranking on Nightmare difficulty.
Kill all monsters in the manor.
Beat the game in under 1 hour.
Beat the game without using heals or revives.
Complete all puzzles.
Escape using every route.