The Cryptic Killers Murder of a Marine Biologist Mystery Case File is a party game that involves one player solving a murder mystery. Set in 2025, the game has a crime theme and is designed for ages 14 and up. Made of paper, the game provides an interactive and engaging experience for older teens and adults who enjoy solving puzzles and deciphering clues. With its captivating storyline and immersive gameplay, this mystery case file is sure to be a hit among those who enjoy a clever challenge.