Here is the full list of all 31 MADiSON achievements.
Blind Blue Knees five times.
Unlock every achievement of the game.
Complete the game taking 75 or fewer pictures.
Complete the game taking 40 or fewer pictures.
Complete the tunnels section under 3 minutes.
Take 500 photos.
Finish the game under 2.5 hrs.
Complete the game in hard mode or higher.
Survive through the entire Blue Knees section.
Find every blue collectible.
Find every collectible in the game.
Complete the mausoleum section under 5 minutes.
Find every red collectible.
Complete the game.
Finish the game under 6 hrs.
Let Blue Knees kill you.
Take 100 photos.
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.
Survive through the entire Cathedral section.
Take 50 photos.
Reach Luca's storage limit.
Find a collectible.
Get back to the main house for the first time.
Break the shovel.
Find the hidden message on the mirror.
Store an item for the very first time.