From Sega Retro


System(s): Sega Dreamcast
Publisher: Vivarium (Japan), Sega (US)
Peripherals supported: Dreamcast VGA Box, Visual Memory Unit, Dreamcast Microphone
Genre: Cohabitation Training Simulation/Doukyo-Gata Ikusei Simulation (同居型育成シミュレーション)[1][2], Simulation[3]

Number of players: 1
Release Date RRP Code
Sega Dreamcast
¥6,800 (7,140)6,800e[2] T-39402M
Sega Dreamcast
(Special Package Ban)
¥7,800 (8,190)7,800e[2] T-39401M
Sega Dreamcast
$49.9549.95[4] 51048
ESRB: Teen

Seaman, called Seaman: Kindan no Pet (シーマン 〜禁断のペット〜) in Japan, is a video game developed by Vivarium for the Sega Dreamcast in 1999. The game was later ported to the PlayStation 2 in 2001.


Seaman's face is that of Yoot Saito, the leading man behind Vivarium.


It debuted with the Dreamcast Microphone, which was bundled with the game. The game was not released in Europe (plans were once in place to release it there in 2001), though the Microphone accessory was (Planet Ring being the only game released in that region to be compatible with the peripheral).

Japanese consumers also had an option to buy a "Special Package" bundle, which as well as including the game and microphone, also included a clear VMU (as the game requires one to function).

120,000 copies of the game were sold in Japan in the first three weeks of sale[6].


For a while after its release, Seaman was the best-selling Dreamcast game in Japan, beating Sonic Adventure and SoulCalibur[7]. Famitsu sales charts compiled until early 2004 show it as the third highest-selling Dreamcast game of all-time in that region[8].

Sequels/updates Christmas Seaman and Seaman 2001 were released in Japan, and the game was also followed by a PlayStation 2 sequel, Seaman 2.

Production credits

  • Produced & Game Designed By: Yoot Saito
  • Development Directed By: Satoshi Endo, Arka Roy
  • Graphics Directed By: Atsushi Hotta
  • Programings By: Kazuhiko Sugita, Tak Suzuki, Shigekazu Ito, Yoshito Hirose
  • Graphics by: Tomomasa Ueda, Bujin Hirai, Nobuyuki Usuki, Koichi Okada
  • Graphics by: Minoru Urano, Yoko Shibusawa, Yiting Fu, Cozzy Sumitomo, Makoto Iwanaga
  • Narrations By: Toshiyuki Hosokawa
  • Musics By: Trans Global Underground
  • Developed by: Vivarium Inc
  • Presented & Copyrights All Reserved By: Digitoys Co.,Ltd
See You In Seaman2001
Source: In-game credits (JP)

US Version Credits
Manual Production Staff
Japanese Version Original Staff
  • Producer and Game Designer: Yoot Saito
  • System Designer: Aka Roy
  • Director: Satoshi Endo
  • Art Director: Atsushi Hotta
  • Programmers: Kazuhiko Sugita, Takahisa Suzuki, Shigekazu Ito, Yoshito Hirose
  • Sound: Tsuneo Kaneda
  • Graphic Artists: Makoto Iwanagawa, Tomomasa Ueda, Nobuyuki Usuki, Minoru Urano, Koichi Okada, Yoko Shibusawa, Bujin Hirai, Yiting Fu, Cozzy Sumitomo
  • Assistant Programmers: Ryo Takeishi, Makoto Fukuichi, Tomomi Hiramatsu
All trademarks are the property of their respective owners.
"WIFFLE" is a registered trademark of The Wiffle Ball, Inc. and is used with permission.
Source: US manual

Magazine articles

Main article: Seaman/Magazine articles.

Promotional material

Print advert in Famitsu (JP) #555: "1999-08-06" (1999-07-23)
also published in:
Print advert in Dreamcast Magazine (JP) #1999-25: "1999-25 (1999-08-13,20)" (1999-07-30)
Print advert in Electronic Gaming Monthly (US) #132: "July 2000" (2000-06-06)
also published in:
Print advert in Next Level (AR) #20: "Septiembre 2000" (2000-xx-xx)


Physical scans

Sega Retro Average 
Publication Score Source
80 [12]
73 [13]
84 [14]
60 [15]
73 №555, p30
Sega Dreamcast
Based on
5 reviews

Dreamcast, JP
Seaman DC JP Box Back.jpgNospine-small.pngSeaman DC JP Box Front.jpg
Seaman DC JP Disc.jpg
Dreamcast, JP (Special Package)
Seaman DC JP Box Back Special.jpgNospine-small.pngSeaman DC JP Box Front Special.jpg
Dreamcast, US
Seaman DC US Box Back.jpgNospine-small.pngSeaman DC US Box Front.jpg
Seaman dc us disc.jpg
Seaman DC US Box Back JewelCase.jpgSeaman DC US Box Front JewelCase.jpg
Jewel Case

Technical information

ROM dump status

System Hash Size Build Date Source Comments

External links