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.
Win Hector's wish.
Turn Sebastian into a master chef.
Finish the game.
Be mentioned in the credits.
Win both Kony's and Oliver's wish.
Make Xiang rich.
Make Nikola and Lariat go on a date.
Change Shakespeare's ending.
Lose a game of trivia.
Mariano's relationship problems.
Correctly answer all the questions of a trivia game.
A character died.
Win all of Ava's wishes in one timeline.
Win a game of trivia.
Be trolled by the roulette going back.