Originally released in Japan as Eikoku Tantei Mysteria: The Crown, in London Detective Mysteria players will solve cases as main protagonist Lady Whiteley, where the choices they make influence their detective rank and relationships with other characters. As Lady Whiteley, players will mingle with dashing detectives and debonair characters of questionable background while exploring the darker, less known side of Victorian-era London. The PC version will receive a number of improvements including support for multiple resolutions and language options, ensuring that the detailed character illustrations remain crisp to keep players immersed in the story as they learn more about the cast of characters while tracking their relationships with them in-game.