Phantasy Star II Text Adventures (1991) were a series of eight text adventure / visual novel videogames available to Japan-only users of Sega Meganet (a modem for the Mega Drive) later re-released on the Sega CD. Fortunately, translation group M.I.J.E.T. translated them all in 2007–2010 and so I’ve beat all of them at last, using Picodrive emulator for my PSP.
Each of the games takes place shortly before Phantasy Star II, documenting the backgrounds of its characters, and explaining what brings them to the town Paseo where they eventually team up to investigate the pervasive troubles of the Algol Solar System.
Detailed info and FAQs avaliable at PSCave. Most PS-ish one is the Nei’s adventures, while Rudy’s is most difficult. I personally enjoyed Shilka’s part, but the best one is undoubtedly Kain’s, with most cyberpunk atmosphere. Being like Snatcher or Blade Runner, it definitely worth of playing it and tooks just 20–40 mins to complete.