Here is the full list of all 31 MADiSON achievements.
Complete the game.
Finish the game under 6 hrs.
Blind Blue Knees five times.
Let Blue Knees kill you.
Make the four virgins cry.
Find Elizabeth's diary lost page.
Play the "Do not listen" tape.
Complete the shelves section under 5 minutes.
Get back to the main house a second time.
Let Hans kill you.
Take 100 photos.
Reach Luca's storage limit.
Get back to the main house for the first time.
Take 50 photos.
Break the shovel.
Find a collectible.
Find the hidden message on the mirror.
Store an item for the very first time.
Find every red collectible.
Find every blue collectible.
Find every collectible in the game.
Take 500 photos.
Survive through the entire Cathedral section.
Survive through the entire Blue Knees section.
Complete the mausoleum section under 5 minutes.
Complete the tunnels section under 3 minutes.
Complete the game taking 75 or fewer pictures.
Complete the game taking 40 or fewer pictures.
Finish the game under 2.5 hrs.
Complete the game in hard mode or higher.
Unlock every achievement of the game.