Here is the full list of all 36 The Invisible Hours achievements.
Go to the hotel room
Use the Spirit Radio
Watch all the scenes in chapter 4
Collect all the clues
Watch Mundy's death
Discover who killed Tesla
Travel back in time with Flora
Watch Gustav's fall
Watch Gustav for the entire game
Watch Vanderberg's murder
Watch all the scenes in chapter 3
Watch Bernhardt and Mundy recite Shakespeare
Watch all the scenes in chapter 2
Explore the entire Island
Find the chemistry notes
Watch all the scenes in chapter 1
Find the secret workshop in the basement
Watch Bernhardt putting on makeup
Watch Edison play chess
Find Deadlight logo
Look through the telescope
Find the Ulysses poem
Find the first Tesla Diary
Activate Following mode
Be walked through by a character
Find Lafcadio Boone's mask
Find all of Tesla's diaries
Find all the newspapers clips
Find old photos of all the characters
Find all the letters from the guests
Find the hats
Listen to the lullaby
Find Edison's food bowl
Try to bang the gong
Find the library receipt
Find the fox