Full list of all 11 Memoranda achievements worth 1,000 gamerscore. It takes around 1-2 hours to unlock all of the achievements on Xbox One.
All achievements
Achievements they've won
Achievements they've not won
It starts with "Monkey".
Took every humanimal's photo.
Helped the stranded sailor.
Found all the backer pictures.
No one's stopping you now!
Changed the music in Mizuki's home.
Seems like he had an appropriate name!
Managed to get the card "signed" by Phil.
Found the Spaghetti Man.
Found the frequencies for Qardash.
Solved the puzzles in the doll maker's house.