Sampler CD given out at Tokyo Game Show 2019 to those who tried the demo to Atelier Ryza: Ever Darkness & the Secret Hideout, received Gust-chan and Kogust-chan business cards for doing so, and presented them at Gust's sales booth when making a purchase.

M1~5 from Atelier Ryza: Ever Darkness & the Secret Hideout
Composed & Arranged by
  Kosuke Mizukami: 1
  Kazuki Yanagawa: 2
  Shin-ichiro Nakamura: 3
  Asami Mitake: 4
  Hayato Asano: 5

Recording Engineer
  Takeshi Muramatsu: 1,2,3,4

Mixing Engineer
  Takeshi Muramatsu: 1,3,4
  Takashi Saeki: 5

M6~8 from Atelier Online: Alchemist of Bressisle
Composed & Arranged by ACE (TOMOri Kudo / CHiCO)

M9 from Atelier Ayesha: The Alchemist of Dusk
Composed & Arranged by Daisuke Achiwa
Guitar & Bass: Dani

M10 from Atelier Escha & Logy: Alchemists of the Dusk Sky
Composed & Arranged by Kazuki Yanagawa

M11 from Atelier Shallie: Alchemists of the Dusk Sea
Composed & Arranged by Hayato Asano

Playing
  Flute: Jun-ichiro Taku (1,2,3,4)
  Piccolo: Jun-ichiro Taku (4)
  Oboe: Yuka Asahara (1,3,4)
  Clarinet: Hidehito Naka (1,2,4)
  Bassoon: Atsuko Hirohata (3,4)
  Horn: Tatsuo Nippashi / Midori Tanaka (1,2,4)
  Trumpet: Kenichi Tsujimoto / Cheonho Yoon (2,4)
  Trombone: Hikaru Koga / Masayuki Nakanishi (2)
                   Hikaru Koga / Masayuki Nakanishi / Takumi Shinozaki (4)
  A.Guitar: Yoshihiko Yagyu (1,4)
  Bass: Yosuke Kinoshita (1)
  Violin: Hitoshi Konno / Kyoko Ishigame / Shizuka Kawaguchi / Ayaka Jomoto (1,2,3,4)
  Viola: Masaki Shono / Kintaro Hagiya (1,2,4)
  Cello: Hiroki Kashiwagi / Akio Ueki (1,2,3,4)
  Double Bass: Shigeki Ippon (2,3,4)