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