A new detective case opens every night at midnight. Search an illustrated crime scene with a flashlight, listen to voiced witness statements, and accuse the killer, the method and the motive. Every case is fair: everything you need is in the file, checked by an automatic solver and playtested before it ships. Free in any browser, no download, no account to start. Also on Android. Six languages. Casebook Pro adds the archive, all hints and the long Sunday Dossier.