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