Ys Book I-II © 1989 Hudson Soft.
Game ID: HCD4074
Released on December 21, 1989 in Japan.
Main Programmers: Hiroshi Hasegawa, Hiromasa Iwasaki
Assistants: Takahiro Haga, Toshimasa Ebina, Hideki Sahashi, Takeshi Sawaguchi, Satoru Sugimoto
System Engineers: Isamu Izumi, Masahiro Tobita
Technical Advisers: Katsuhiro Nozawa, Yoshio Motosako, Takaki Kobayashi
Chief Graphic Designer: Tsukasa Shindo
Map Designer: Tsukasa Shindo
Character Designer: Maki Ito
Main Animation Designers: Moto Yamaguchi, Tomoaki Urita, Ryomi Momota
Sub Animation Designers: Mari Takeda, Taiichi Matsuda, Akinobu Sekiguchi, Toshio Okada, Koji Matsuura
Continuity Script: Hideyuki Amagi
Original Pictures: Hideyuki Amagi, Norie Okada
Screen Play: Hiromasa Iwasaki
Scenario: Hiromasa Iwasaki, Yutaka Nagayama
Translation Staff: John Greiner, Sonoko Saito, Kenneth Sutherland, Anthony A. Ancona
Sound Director: Toshiyuki Sasagawa
CD-Audio Arranged by: Ryo Yonemitsu
Sound Effects: Keita Hoshi
Voice Actors: Alan Oppenheimer (Darm), Jim Cummings (Dalles), Michael Bell, Shannon Beatty (Maria Messa), Louise Vallance (Tarf Hadal), Bruce Lanoil (Luta Gemma), Thomas Haden Church (Goban Toba), Dan Gilvizan (Keith Fact), David Stary (Kekka Dabbie), Debi Derryberry (Feena), Louise Vallance (Lair), Mea Martineau (Lilia), Alan Oppenheimer (Darm)
Voice Direction by: Michael Hack (TMS L.A.)
Producer: Toshinori Oyama
Director: Tomonori Matsunaga, Hiromasa Iwasaki
Co-operated with: Alfa System, Compozila, KMO, Joe Down Studio
Game's ROM.