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