 With each play-through, certain clues and actual identity of The Ripper vary, though the bulk of the story is unchanged, and clues indicating the guilt of all four suspects will appear regardless of who the killer is.For instance, Catherine Powell experiences mysterious surges in brain wave activity that coincide with all the Ripper's murders regardless of whether or not she actually is the Ripper, and no alternative explanation for these surges is provided.However, the changes in the game's story and puzzles are limited to the game's third act- after Farley's death.