From Sega Retro


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Seaman, Title Screen US.png

Seaman, Title Screen JP.png

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 Rating: All Ages
Sega Dreamcast
(Special Package Ban)
¥7,800 (8,190)7,800e[2] T-39401M
Sega Rating: All Ages
Sega Dreamcast
$49.9549.95[4] 51048
ESRB: Teen

Seaman, known as Seaman: Kindan no Pet (シーマン 〜禁断のペット〜) in Japan, is a Sega Dreamcast digital pet simulation game developed by Vivarium. First published in Japan by Vivarium themselves in July 1997, it was later localized in English and published in the United States by Sega in August 2000, featuring voice narration by renowned American actor Leonard Nimoy.

Like Christmas NiGHTS, the game received a special Christmas-themed version titled Christmas Seaman, a re-release in August 2001 titled Seaman: Kindan no Pet: 2001 Nen Taiouban with minor updated features (which served as the basis for the localized version), and a Japan-exclusive PlayStation 2 port in November 2001 titled Seaman: Kindan no Pet: Gaze Hakushi no Jikken Shima.


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[7].


For a while after its release, Seaman was the best-selling Dreamcast game in Japan, beating Sonic Adventure and SoulCalibur[8]. Famitsu sales charts compiled until early 2004 show it as the third highest-selling Dreamcast game of all-time in that region[9].

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

In May 2022, Japanese coffee brand Mt Rainier ran a promotional campaign where a customer could scan QR codes to access augmented reality scenes. One of the QR codes leads to an underwater scene featuring Seaman[10], with it also appearing on their webpage. [11] It speaks in Japanese before swimming away.


Localised names

Also known as
Language Localised Name English Translation
English (US) Seaman Seaman
Japanese シーマン 〜禁断のペット〜 Seaman: Kindan no Pet

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
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.
US manual
Seaman DC US Manual.pdf

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
{{{{{icon}}}|L}} Division by zero.
Based on
0 review
Sega Retro Average 
Publication Version Score
Dreamcast Magazine (JP) NTSC-J
Dreamcast Magazine (UK) NTSC-U
Dorimaga (JP) NTSC-J
Edge (UK) NTSC-U
Electronic Gaming Monthly (US) NTSC-U
Entsiklopediya igr dlya Dreamcast (RU)
Famitsu (JP) NTSC-J
GamePro (US) NTSC-U
Gamers' Republic (US) NTSC-U
Next Generation (US) NTSC-U
Strana Igr (RU)
Video Games (DE) NTSC-U
Sega Dreamcast
Based on
13 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 Manual.pdf
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
Sega Dreamcast
2000-05-08 GD-R Page

External links


  1. Seaman: Kindan no Pet (Dreamcast) Japanese box (back)
  2. 2.0 2.1 2.2 2.3 2.4 (Wayback Machine: 2007-12-09 07:34)
  3. (Wayback Machine: 2020-02-01 22:57)
  4. 4.0 4.1 (Wayback Machine: 2005-02-09 19:08)
  5. (Wayback Machine: 2003-12-19 00:14)
  6. (Wayback Machine: 2000-08-15 05:36)
  7. Edge, "October 1999" (UK; 1999-09-06), page 148
  8. Electronic Gaming Monthly, "June 2000" (US; 2000-05-09), page 30
  9. (Wayback Machine: 2008-08-21 06:06)
  11. (Wayback Machine: 2022-05-11 04:35)
  12. File:Seaman DC US Manual.pdf, page 32
  13. Dreamcast Magazine, "1999-24 (1999-08-06)" (JP; 1999-07-23), page 74
  14. GamePro, "August 2000" (US; 2000-0x-xx), page 40
  15. Electronic Gaming Monthly, "September 2000" (US; 2000-08-08), page 136
  16. DC-UK, "December 2000" (UK; 2000-10-23), page 80
  17. Dreamcast Magazine, "1999-24 (1999-08-06)" (JP; 1999-07-23), page 19
  18. Dreamcast Magazine, "No. 14" (UK; 2000-10-05), page 78
  19. Dorimaga, "2002-18 (2002-10-11)" (JP; 2002-09-27), page 34
  20. Edge, "October 2000" (UK; 2000-09-11), page 103
  21. Electronic Gaming Monthly, "September 2000" (US; 2000-08-08), page 155
  22. Entsiklopediya igr dlya Dreamcast, "Izdaniye chetvertoye, dopolnennoye" (RU; 2002-xx-xx), page 198
  23. Famitsu, "1999-08-06" (JP; 1999-07-23), page 30
  24. GamePro, "September 2000" (US; 2000-0x-xx), page 106
  25. Gamers' Republic, "August 2000" (US; 2000-xx-xx), page 64
  26. Next Generation, "September 2000" (US; 2000-08-15), page 106
  27. Strana Igr, "Sentyabr 2000 1/2" (RU; 2000-xx-xx), page 58
  28. Video Games, "10/2000" (DE; 2000-09-06), page 122


Games in the Seaman Series
Seaman (1999) | Christmas Seaman: Omoi o Tsutaeru Mou Hitotsu no Houhou (1999) | ISAO Promotion Disc by Seaman (2000) | Seaman: Kindan no Pet: 2001 Nen Taiouban (2000) | Seaman Esa Disc (2000) | Seaman 2: Peking Genjin Ikusei Kit (Taikenban) (2007)
Seaman Ikusei Shien Kit (2000)