Here is the full list of all 35 Forgotten Hill Mementoes achievements.
Start your journey through memory
Play some music
Kill your wife... again
Be killed by your wife
Collect every item on your list
Do what's needed to have your friend always with you
This bed is so confortable...
Activate the machine
Do the only thing left to do
Win a TicTacToe game
Play the right music at the right moment
Kill your father
Stab your son
Find the Puppeteer mask
Find the Colonel mask
Make the Gambler mask
Make a mask for Ruth
Be killed by the mutant monster
Be killed by a zombie woman
Kill the mutant monster
Where have I heard that music before?
Show some love to a zombie woman
Find your house key
Play with Jack in the box toy
Make a mutant pumpkin spider
Make a mutant carnivorous pumpkin
Grow a pumpkin
Find all weighing objects
Find all the ingredients for the spell
Cast the spell
Try to grow something new
It's time to kill them
Use potions to create new mutations
Complete the game without using any hint