Yes it works with the Genesis RunUMD loader. I read about people getting it to work that way, and I went out and bought the next day. You will have the change the flash1 folder with one from a 2.5 US dump. Because when you start the game, you won't be able to read the text asking if you wanna turn on the autosave. The people that made the Genesis loader are french and probably included the flash1 files from a french dump.