The Famicom Modem(ファミコンネットシステム,lit. Family Computer Network System?) is a video game peripheral for the Family Computer released only in Japan in 1988 that uses a card based format like Hudson Soft's/NEC's PC Engine. It allowed the user access to a server that provided game cheats, jokes, weather forecasts, and a small amount of downloadable content. It could also be used to make live stock trades. Five prototype games existed that made use of the modem, including a version of Go, but they were never released on the market.