Here is the full list of all 16 Majotori achievements. It takes around 4-5 hours to unlock all of the achievements on Windows.
Finish the game twice.
Change Shakespeare's ending.
Win Hector's wish.
Turn Sebastian into a master chef.
Make Nikola and Lariat go on a date.
Win all of Ava's wishes in one timeline.
Finish the game.
Be mentioned in the credits.
Make Xiang rich.
Mariano's relationship problems.
Win both Kony's and Oliver's wish.
Correctly answer all the questions of a trivia game.
Be trolled by the roulette going back.
Win a game of trivia.
A character died.
Lose a game of trivia.