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