Game Genie Codes

The following are known Game Genie Codes for Halley Wars on SEGA Game Gear.

• Collect 1 Gun Power-Up & Get Max
  00F-5FF-E69
  04F-5EF-C43
  3EF-5DF-082
• Collect 1 Thrust for Maximum Speed
  00F-74F-E69
  03F-73F-C4F
  3EF-72F-082
• Keep Power-Ups After Dying
  00F-E1E-19E
• Infinite Lives
  00F-F2E-19E
• Start With 1 Life
  014-43F-E66
• Start With 5 Lives
  054-43F-E66
• Start With 7 Lives
  074-43F-E66