Here is the full list of all 10 Suffer The Night achievements.
Finish the game without collecting all the hidden tarot cards and entering the developers room.
Find all tarot cards, enter the developers room and destroy the source code.
Complete the Necrovania mini game in the basement.
Collect all developer disc.
Successfully make eggs and toast with coffee.
Sign the book, let him in.
Defeat the armless creature hunting you in the dungeon.
Complete all three sections of the funhouse ride.
Find and burn the book in Leviathans labyrinth.
Defeat Mr. Tops.