Here is the full list of all 31 MADiSON achievements.
Finish the game under 6 hrs.
Complete the game.
Survive through the entire Blue Knees section.
Blind Blue Knees five times.
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.
Store an item for the very first time.
Take 100 photos.
Complete the tunnels section under 3 minutes.
Find a collectible.
Reach Luca's storage limit.
Get back to the main house for the first time.
Take 50 photos.
Find the hidden message on the mirror.
Find every red collectible.
Find every blue collectible.
Find every collectible in the game.
Let Blue Knees kill you.
Take 500 photos.
Survive through the entire Cathedral section.
Complete the mausoleum section under 5 minutes.
Break the shovel.
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.