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