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