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.
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.
Win Hector's wish.
Change Shakespeare's ending.
Win both Kony's and Oliver's wish.
A character died.
Lose a game of trivia.
Mariano's relationship problems.
Correctly answer all the questions of a trivia game.
Win a game of trivia.
Be trolled by the roulette going back.