The following are known Game Genie Codes for Gaiares on SEGA Genesis.

• AECT-AAE6
  Start with 2 ships
• AJCT-AAE6
  Start with 3 ships
• A6CT-AAE6
  Start with 8 ships
• BECT-AAE6
  Start with 10 ships
• AJEA-AA20
  Infinite ships
• AECT-AAFC
  Start with 1 credit instead of 5
• ANCT-AAFC
  Start with 3 credits
• A6CT-AAFC
  Start with 7 credits
• BECT-AAFC
  Start with 9 credits
• A2ET-AA98
  Infinite credits

Note: Codes 11 & 12 do not work with codes 22 – 27.

• AJEA-AA6J
  Do not lose weapon type when you lose a ship
• DAEA-AA58
  do not lose weapon type or power level when you lose a ship
• AK4A-AA6N
  Break Defender lasts forever
• RECT-A60A+9TCT-BCRC+AJCT-ACGE
  Start with P-cannon
• RECT-A60A+9TCT-BCRC+AJCT-AEGE
  Start with G-beam
• RECT-A60A+9TCT-BCRC+AJCT-AGGE
  Start with S-laser
• RECT-A60A+9TCT-BCRC+AJCT-AJGE
  Start with T-missile
• RECT-A60A+9TCT-BCRC+AJCT-ALGE
  Start with H-laser
• RECT-A60A+9TCT-BCRC+AJCT-ANGE
  Start with V-laser
• RECT-A60A+9TCT-BCRC+AJCT-ARGE
  Start with R-collider
• RECT-A60A+9TCT-BCRC+AJCT-ATGE
  Start with E-smash
• RECT-A60A+9TCT-BCRC+AJCT-A2GE+BJST-AA74
  Start with T-Braster
• RECT-A60A+9TCT-BCRC+AJCT-AWGE+BJST-AA74
  Start with F-Formation
• RECT-A60A+9TCT-BCRC+AJCT-AYGE+BJST-AA74
  Start with T-Vulcan
• RECT-A60A+9TCT-BCRC+AJCT-A4GE+BJST-AA74
  Start with Q-Missile
• RECT-A60A+9TCT-BCRC+AJCT-A6GE+BJST-AA74
  Start with H-Missile
• RECT-A60A+9TCT-BCRC+AJCT-A0GE+BJST-AA74
  Start with A-Bullet
• AJCT-AA8T
  Combine with Codes 14 through 27 to start that weapon with max power