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