According to an interview with one of the developers it is not possible to play it with the standard 4-player adaptor in 16 player mode. the developers came up

According to an interview with one of the developers it is not possible to play it with the standard 4-player adaptor in 16 player mode. the developers came up with a daisy chain method but did not release the hardware nor the specs. Daisy chaining the four player adaptors would not have worked. https://web.archive.org/web/20100509163809/http://fb2k.retro-spect.ca/rchampagne.html https://web.archive.org/web/20100509163809/http://fb2k.retro...