The comic-book series "From Hell, " in which Moore uses the Jack the Ripper killings as a precursor to 20th-century violence, runs to about 500 pages, including 40-plus pages of footnotes.
After 25 years, police say they could no longer prosecute the man - dubbed Wearside Jack - who sent letters and a tape to police claiming to be the Yorkshire Ripper.
Later on in the game you can also tap into your darker side, invoking your Jack the Ripper alter-ego which gives you an extra combat boost for a short period of time.