"Pad Nifty (パッドニフティ) is a piece of Sega Saturn software released exclusively in Japan. It was used to access Fujitsu's now defunct NIFTY-Serve network.
Sega had a presence on NIFTY-Serve with their Sega Game Information Station, with the network having previously hosted dedicated Sega bulletin boards.
It is completely reliant on the Sega Saturn Modem (of which it was bundled with) and the defunct NIFTY-Serve network, as such it cannot function in the modern age."
"A Saturn based game client for Fujitsu's "Habitat II" virtual world which itself was a licensed version of Fujitsu's WorldsAway virtual world launched September 1995.
The service was initially made available online to Windows users in March 1996 and 4 months later the Saturn client was released.
It is reasonably likely that this would have been cross platform so Windows/Saturn users would be able to play on the same server. It is completely reliant on the Sega Saturn Modem due to the client/server relationship and thus cannot function in the modern age."