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