From Sega Retro


  • NTSC-U
  • NTSC-J

Gaiares MDTitleScreen.png

Gaiares MD JP TitleScreen.png

System(s): Sega Mega Drive
Publisher: Renovation Game (Japan), Renovation Products (US)
Genre: Shooting[1][2]

Number of players: 1
Release Date RRP Code
Sega Mega Drive
¥8,400 (8,652)8,400e[3] T-49013
Sega Mega Drive
$69.9569.95[5] 49066
Sega Mega Drive
DM 100100
Sega Mega Drive

This short article is in need of work. You can help Sega Retro by adding to it.

Gaiares (ガイアレス) is a Sega Mega Drive horizontal shoot-'em-up developed by Telenet Japan. First published in Japan by Renovation Game in December 1990, it was later brought to the United States the following February, and eventually brought to Europe later that year. One of the first Mega Drive games to utilize an 8 Megabit cartridge over the standard size of 4 Megabit, Gaiares (along with Technosoft's Thunder Force III, was one of the earliest shoot-'em-ups to demonstrate the technical capabilities of Sega's new 16-bit hardware.


In the year 3000, humans have polluted Earth to such an extent that Gulfer, a group of space pirates, plan to use the pollution to fuel weapons of mass destruction. The United Star Cluster of Leezaluth feel the only way to stop this from happening is to blow the Sun up, but allows the humans one chance to save themselves: by sending Dan Dare (Diaz in Japan) in a special ship to stop Gulfer.

Aiding Dan in a special sub-ship is the TOZ System, run by Leezaluth emissary Alexis, which can steal powers from the space pirates's own ships. Should you succeed, Leezaluth will give the humans a new planet to inhabit.


A changes movement speed. B shoots. C sends Alexis out straight ahead to take the weapon of the nearest enemy. You can keep taking the same type of weapon, which will increase that weapon's strength, until the type has been maxed out. Furthermore small capsules can be picked up to wipe out all enemies on screen or to install a shield that can absorb multiple enemy hits.

Some stages feature branching paths that can be selected by flying high or low on the screen.


The famous Gaiares advertisement that has become associated with the game's American release.

The game's United States release shipped with a poster featuring the game's Western cover artwork.

A proper European release was planned by Ubisoft[6] but ultimately did not materialize, and Europe instead received the Japanese version with an additional multi-language manual.[7]

American advertising campaign

Main article: Jamie Bunker.

In 1990, Renovation Products selected one of their game testers, Jamie Bunker, to be the spokesperson for the upcoming Sega Mega Drive game Gaiares' United States advertising campaign.[8] Bunker posed with the game's United States release in a series of three advertisements, with each labeling the seventeen-year old spokesman a "professional gamer". Contrasting with the often juvenile and exaggerative statements of other game advertisements of the day, Renovation Products' advertisements simply featured a visibly genuine Bunker presenting the game with a recommendation of its quality, and has become one of the Mega Drive era's most fondly-remembered advertising campaigns.


During development, Gaiares was known by the name Aztion (アズシオン).[9]

A significant majority of the game's 8 Megabit size is dedicated to the storage of cutscene graphics.

Production credits

  • Game Design: M.Yamamoto, K.Yokota
  • Character Design: T.Iwata, K.Yokota
  • Graphic Design: K.Yokota, T.Iwata, Y.Kuzumoto
  • Program: M.Yamamoto
  • Sound: S.Ogawa (Business Support Co., Ltd.)
  • Special Thanks: K.Fukushima, Y.Fukushima, J.Fukushima, T.Fukushima, Y.Abe, T.Kinoshita, E.Kikuchi, T.Miura, T.Matsuzawa, A.Suzuki, Y.Shimizu, K.Ohta, Y.Yamauchi, T.Umezu
(C) Telenet Japan 1990
(C) Renovation Products 1990
In-game credits

Magazine articles

Main article: Gaiares/Magazine articles.

Promotional material

Main article: Gaiares/Promotional material.

Physical scans

Sega Retro Average 
Publication Score Source
{{{{{icon}}}|L}} Division by zero.
Based on
0 review
Sega Retro Average 
Publication Version Score
1700 igr dlya Sega (RU)
Beep! MegaDrive (JP) NTSC-J
Computer + Video Giochi (IT)
Electronic Gaming Monthly (US) NTSC-U
Entsiklopediya luchshikh igr Sega. Vypusk 1 (RU)
Famitsu (JP) NTSC-J
GamePro (US) NTSC-U
Hippon Super (JP) NTSC-J
Joystick (FR) NTSC-J
Mega Drive Fan (JP) NTSC-J
MegaTech (UK)
MegaTech (UK) PAL
Mean Machines Sega (UK)
Player One (FR)
Power Play (DE)
Sega Pro (UK) NTSC
Sega Saturn Magazine (JP) NTSC-J
Tricks 16 bit (RU)
User (GR) NTSC
Video Games (DE)
Sega Mega Drive
Based on
20 reviews


Mega Drive, JP
Gaiares MD JP Box.jpg
Gaiares MD JP CartTop.jpg
Gaiares MD JP Cart.jpg
Gaiares md jp manual.pdf
Mega Drive, US
Gaiares MD US Box.jpg
Gaiares md us cart.jpg
Gaiares md us manual.pdf
Gaiares MD US Poster.jpg
Gaiares MD US pcb.jpg
Mega Drive, EU (JAP Import)

Technical information

ROM dump status

System Hash Size Build Date Source Comments
Sega Mega Drive
CRC32 5d8bf68b
MD5 47e140ae1e70984e6cd638e6e8f8485f
SHA-1 f62e8be872dc116c4cc331c50ae63a63f013eb58
1MB 1990-12 Cartridge (US/JP)


  1. File:Gaiares MD JP Box.jpg
  2. 2.0 2.1 (Wayback Machine: 2020-07-02 23:21)
  3. Beep! MegaDrive, "January 1991" (JP; 1990-12-08), page 8
  4. 4.0 4.1 Electronic Gaming Monthly, "March 1991" (US; 1991-xx-xx), page 18
  5. 5.0 5.1 GamePro, "March 1991" (US; 1991-xx-xx), page 78
  6. Sega Force, "January 1992" (UK; 1991-12-12), page 10
  8. (Wayback Machine: 2010-10-30 20:12)
  9. File:Mdfan_JP_1990-08.pdf, page 79
  10. 1700 igr dlya Sega, "" (RU; 2003-xx-xx), page 83
  11. Beep! MegaDrive, "January 1991" (JP; 1990-12-08), page 36
  12. Computer + Video Giochi, "Aprile 1991" (IT; 1991-xx-xx), page 46
  13. Entsiklopediya luchshikh igr Sega. Vypusk 1, "" (RU; 1999-xx-xx), page 316
  14. Famitsu, "" (JP; 199x-xx-xx), page 1
  15. Hippon Super, "January 1991" (JP; 1990-12-04), page 43
  16. Joystick, "Mars 1991" (FR; 1991-0x-xx), page 124
  17. Mega Drive Fan, "March 1991" (JP; 1991-02-08), page 99
  18. MegaTech, "Xmas 1991" (UK; 1991-12-06), page 78
  19. MegaTech, "February 1992" (UK; 1992-01-20), page 40
  20. Mean Machines Sega, "October 1992" (UK; 1992-09-xx), page 138
  21. Player One, "Décembre 1991" (FR; 1991-xx-xx), page 60
  22. Power Play, "4/91" (DE; 1991-03-15), page 128
  23. Sega Pro, "April 1993" (UK; 1993-03-11), page 65
  24. Sega Saturn Magazine, "September 1995" (JP; 1995-08-08), page 86
  25. Tricks 16 bit, "Tricks Sega Gold 800 igr" (RU; 1998-xx-xx), page 15
  26. User, "Mártios 1992" (GR; 1992-0x-xx), page 83
  27. Video Games, "1/91" (DE; 1991-03-27), page 84


Gaiares MDTitleScreen.png

Main page | Comparisons | Maps | Hidden content | Magazine articles | Reception | Promotional material | Region coding