I'll second the hell out of that notion. The '82 Live On Broadway video is one of my favorite films of all time. They haven't invented a mathematical equation large enough to describe how much better George Hearn is as Sweeney than Johnny Depp. Chris Groendaal was a pretty terrible Anthony though...trooper6 said:Not a game recommendation, but I think you should watch the actual musical Sweeney Todd rather than the Tim Burton film. Rent the version with the original Broadway actors Angela Landsbury and George Hearns. That is some awesomeness right there.
OT: You may enjoy the game Steambot Chronicles. It's not set in Victorian London, but the fictional land is heavily inspired by it. It's also set in...well, not the Industrial Revolution, but an industrial revolution. Just instead of cars, their IR revolves around giant robots =)