About Mystery Dossier

Mystery Dossier designs playable historical investigations. Our rule: no invented facts. Facts are sourced (a source list is in every file); the investigators who guide you are fictional and presented as such. Texts and illustrations are produced with the help of artificial-intelligence tools and then checked: every puzzle is verified by software and every fact against its sources. Illustrations depict no real person. We treat real tragedies and their victims with respect.