Halley Wars

From Sega Retro


  • Sega Game Gear
  • Sega Game Gear

HalleyWars title.png

Halley Wars, Title Screen JP.png

Halley Wars
System(s): Sega Game Gear
Publisher: Taito (Japan), Sega (US, Europe)
Original system(s): Arcade boards
Developer(s) of original games: Taito
Genre: Shooting[1][2][3]

Number of players: 1
Release Date RRP Code
Sega Game Gear
¥3,8003,800 T-11027
Sega Game Gear
$34.9534.95[5] 2318
Sega Game Gear
Sega Game Gear
£24.9924.99[9][10] 2318
Sega Game Gear
Non-Sega versions

Halley Wars (ハレーウォーズ), known as Space Battle in Brazil, is a shoot-'em-up developed by ITL and published by Taito in Japan, and Sega internationally, for the Sega Game Gear.

This game is a sequel to the arcade game Halley's Comet, which was released in 1986 by Taito. The name is a reference to Halley's Comet, which was last in the inner part of the solar system and visible to the naked eye in 1986.


In the middle of the 21st century, Lord Halley has led numerous assaults against the Earth at the cost of billions of human lives. It is believed that he will strike again soon. As a last ditch effort, the nations of the world have developed a spacecraft to intercept the enemy's attacking forces, break their defenses, and destroy them, securing a future for Earth and its inhabitants.


The game is a vertically scrolling space shooter. The player pilots a spaceship, which can move in all directions with the D-pad. Enemy forces swarm in and attack the player. The craft is equipped with a destructive beam with infinite ammunition, which is fired with 1 and can be held down for rapid-fire. There are several power-ups that can be found inside asteroids or satellites and collected by the player. The destructive beam can be upgraded six times through upgrade items. It is also possible to obtain explosive pods that shoot their own destructive beams with 1 or detonate to destroy all enemies on the screen (except bosses) with 2.

If the player's ship is hit by enemy fire or collides with an enemy or an obstacle (such as asteroids or debris), it is destroyed but a new one spawns in place if the player has remaining ships. The player starts the game with two extra ships. If the player loses a ship without any extra ships left, the game ends. The player gets another extra ship every 10,000 points scored.

Additionally, there is a damage meter in the corner of the screen that tracks damage inflicted to the Earth. It increases by 1-3% points when certain enemies get past the player. There are also comets in some stages that increase the damage meter by 7% points if they are not destroyed by the player. If the damage meter reaches 100%, the Earth has been devastated and the game ends regardless of any extra ships the player may have remaining. The damage meter retains its value from stage to stage. However, at the end of each stage, the game reduces the damage meter by 1% point for every 2,000 points scored in the current stage.


The player's weapon is upgraded to the next level each time a Weapon Upgrade item is collected.

Halley Wars, Weapons, Starting.png

Halley Wars, Weapons, Starting.png

Halley Wars, Weapons, Upgrade 1.png

Upgrade 1
Halley Wars, Weapons, Upgrade 1.png

Halley Wars, Weapons, Upgrade 2.png

Upgrade 2
Halley Wars, Weapons, Upgrade 2.png

Halley Wars, Weapons, Upgrade 3.png

Upgrade 3
Halley Wars, Weapons, Upgrade 3.png

Halley Wars, Weapons, Upgrade 4.png

Upgrade 4
Halley Wars, Weapons, Upgrade 4.png

Halley Wars, Weapons, Upgrade 5.png

Upgrade 5
Halley Wars, Weapons, Upgrade 5.png


Items are collected by shooting open asteroids or satellites, depending on the stage, and then flying over the item.

Halley Wars, Items.png
Blast open to release an item.
Halley Wars, Items.png
Blast open to release an item.
Halley Wars, Items.png
Weapon Upgrade
Upgrades the destructive beam, up to five times. The player's weapon is downgraded one level after losing a ship; if the player only has one ship remaining, it is downgraded to the starting weapon.
Halley Wars, Items.png
Explosive Pod
Collects an explosive pod that follows the ship. Explosive pods shoot their own destructive beam along with the main ship's primary weapon or can be detonated to destroy all enemies on screen. Explosive pods can also be destroyed by enemies or obstacles. If the player loses a ship while possessing explosive pods, they can be gathered again after a new ship spawns.
Halley Wars, Items.png
Speed Upgrade
Upgrades the movement speed of the ship, up to four times.
Halley Wars, Items.png
Laser Shield
Provides a protective shield that absorbs damage that would otherwise destroy the ship. Dissipates after a few hits.
Halley Wars, Items.png
4 Explosive Pods
Arms the ship with four explosive pods. Each has its own destructive beam or can be detonated.
Halley Wars, Items.png
Destroys all enemies on screen and neutralizes any enemy fire.


Halley Wars, Stage 1-1.png

Halley Wars, Stage 1-2.png

Halley Wars, Stage 1 Boss.png

Stage 1

Halley Wars, Stage 2-1.png

Halley Wars, Stage 2-2.png

Halley Wars, Stage 2 Boss.png

Stage 2

Halley Wars, Stage 3-1.png

Halley Wars, Stage 3-2.png

Halley Wars, Stage 3 Boss.png

Stage 3

Halley Wars, Stage 4-1.png

Halley Wars, Stage 4-2.png

Halley Wars, Stage 4 Boss.png

Stage 4

Halley Wars, Stage 5-1.png

Halley Wars, Stage 5-2.png

Halley Wars, Stage 5 Boss.png

Stage 5

Halley Wars, Stage 6-1.png

Halley Wars, Stage 6-2.png

Halley Wars, Stage 6 Boss.png

Stage 6

Halley Wars, Stage 7-1.png

Halley Wars, Stage 7-2.png

Halley Wars, Stage 7 Boss 1.png

Halley Wars, Stage 7 Boss 2.png

Stage 7

Production credits

  • Program: Masaru Mizuno
  • Help and Tools: Seiichi Tajima
  • Sound Program: Kusatsu Onsen
  • Sound: Star Watanabe
  • Graphic Design: Takeshi Narita
  • Special Thanks: Ojamamushi, Yuuichi Kanno
  • Produced by: Taito
In-game credits
Halley Wars GG credits.pdf

Magazine articles

Main article: Halley Wars/Magazine articles.

Promotional material

Print advert in Beep! MegaDrive (JP) #1991-06: "June 1991" (1991-05-08)

Physical scans

Sega Retro Average 
Publication Score Source
{{{{{icon}}}|L}} Division by zero.
Based on
0 review
Sega Retro Average 
Publication Version Score
Aktueller Software Markt (DE)
Beep! MegaDrive (JP) NTSC-J
Console XS (UK) PAL
Computer & Video Games (UK)
Famitsu (JP) NTSC-J
GamePro (US) NTSC-U
Games-X (UK)
Game Zone (UK) NTSC-J
Hippon Super (JP) NTSC-J
Hobby Consolas (ES)
Joypad (FR)
Joystick (FR)
Mega Force (FR) PAL
Micromanía (segunda época) (ES)
Mean Machines Sega (UK) PAL
Player One (FR)
Play Time (DE)
Power Play (DE)
Sega Power (UK) NTSC-J
Sega Power (UK) PAL
Sega Pro (UK)
Sega Pro (UK)
Sega Pro (UK) PAL
Sega Pro (UK) PAL
Sega Force (UK)
Sega Saturn Magazine (JP) NTSC-J
User (GR) PAL
VideoGames & Computer Entertainment (US) NTSC-U
Sega Game Gear
Based on
30 reviews

Halley Wars

Game Gear, JP
HalleyWars GG JP Box Back.jpgNospine-small.pngHalleyWars JP cover.jpg
HalleyWars GG JP Cart.jpg
Game Gear, US
HalleyWars US backcover.jpgNospine.pngHalleyWars US cover.jpg
HalleyWars US cart.jpg
Halleywars gg us manual.pdf
Game Gear, EU
HalleyWars EU backcover.jpgHalley Wars GG EU BoxSpine.jpgHalleyWars EU cover.jpg
HalleyWars US cart.jpg
Halley Wars GG EU Manual.jpg
Game Gear, BR
SpaceBattle GG BR Box.jpg
Halleywars gg br cart.jpg

Technical information

ROM dump status

System Hash Size Build Date Source Comments
Sega Game Gear
CRC32 def5a5d0
MD5 9b26a17f41f2f0dc508d0815945e2634
SHA-1 1c9932f592bb12e61acf597985e0bd5041e45da5
128kB Cartridge (JP)
Sega Game Gear
CRC32 7e9dea46
MD5 1ef93397c3c6d2049b0701d69255a22b
SHA-1 77637e9916a774529d971370c1509eec0b7e1651
128kB Cartridge (US/EU)


  1. File:HalleyWars EU backcover.jpg
  2. File:HalleyWars JP cover.jpg
  3. 3.0 3.1 http://sega.jp/fb/segahard/gg/soft_licensee.html (Wayback Machine: 2013-01-01 20:24)
  4. Electronic Gaming Monthly, "October 1991" (US; 1991-xx-xx), page 27
  5. 5.0 5.1 VideoGames & Computer Entertainment, "December 1991" (US; 1991-1x-xx), page 92
  6. Computer Trade Weekly, "" (UK; 1991-12-09), page 27
  7. Computer Trade Weekly, "" (UK; 1992-01-13), page 19
  8. Games-X, "30th January-5th February 1992" (UK; 1992-01-30), page 5
  9. 9.0 9.1 Computer & Video Games, "June 1994" (UK; 1994-05-15), page 110
  10. 10.0 10.1 Sega Power, "July 1992" (UK; 1992-06-04), page 39
  11. Supergame, "Abril 1992" (BR; 1992-04-xx), page 47
  12. File:Halley Wars GG credits.pdf
  13. ACE, "September 1991" (UK; 1991-08-08), page 75
  14. ACE, "December 1991" (UK; 1991-11-08), page 116
  15. Aktueller Software Markt, "November 1991" (DE; 1991-10-11), page 142
  16. Beep! MegaDrive, "July 1991" (JP; 1991-06-08), page 32
  17. Console XS, "June/July 1992" (UK; 1992-04-23), page 148
  18. Famitsu, "1991-xx-xx" (JP; 1991-06-28), page 20
  19. GamePro, "February 1992" (US; 199x-xx-xx), page 106
  20. Games-X, "18th-24th July 1991" (UK; 1991-07-18), page 40
  21. Game Zone, "November 1991" (UK; 1991-10-08), page 62
  22. Hippon Super, "July 1991" (JP; 1991-06-04), page 115
  23. Hobby Consolas, "Marzo 1992" (ES; 1992-0x-xx), page 52
  24. Joypad, "Octobre 1991" (FR; 1991-09-17), page 70
  25. Joystick, "Septembre 1991" (FR; 1991-0x-xx), page 185
  26. Mega Force, "Janvier 1992" (FR; 1992-01-15), page 45
  27. Micromanía (segunda época), "Febrero 1992" (ES; 1992-0x-xx), page 27
  28. Mean Machines Sega, "October 1992" (UK; 1992-09-xx), page 143
  29. Player One, "Février 1992" (FR; 1992-xx-xx), page 82
  30. Play Time, "3/92" (DE; 1992-02-05), page 80
  31. Power Play, "2/92" (DE; 1992-01-xx), page 169
  32. Sega Power, "October 1991" (UK; 1991-09-05), page 61
  33. Sega Pro, "December 1991" (UK; 1991-11-21), page 69
  34. Sega Pro, "Christmas 1991" (UK; 1991-12-12), page 47
  35. Sega Pro, "July 1992" (UK; 1992-06-18), page 32
  36. Sega Pro, "April 1993" (UK; 1993-03-11), page 74
  37. Sega Force, "April 1992" (UK; 1992-03-19), page 58
  38. Sega Saturn Magazine, "September 1995" (JP; 1995-08-08), page 88
  39. User, "Mártios 1993" (GR; 1993-0x-xx), page 50

Halley Wars

HalleyWars title.png

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