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

• AJBT-AA5R
  Master Code – Must Be Entered
• AL4T-AA3A
  Protection against most hits
• AAJT-CAFA
  Protection from falling off the screen
• HX6T-BAKN
  Vitality-up worth much more
• BDTT-CAF6
  Start with the lightning weapon instead of force
• BXTT-CAF6
  Start with the chaser weapon
• CDTT-CAF6
  Start with the fire weapon
• 8X1T-ACGJ
  Start Stage 1 with 500 vitality instead of 100
• 691T-AGGJ
  Start Stage 1 with 999 vitality instead of 100
• 8X1T-ACGL
  Start Stage 2 with 500 vitality instead of 120
• 691T-AGGL
  Start Stage 2 with 999 vitality instead of 120
• 8X1T-ACGR
  Start Stage 3 with 500 vitality instead of 140
• 691T-AGGR
  Start Stage 3 with 999 vitality instead of 140
• 8X1T-ACG0
  Start Stage 4 with 500 vitality instead of 160
• 691T-AGG0
  Start Stage 4 with 999 vitality instead of 160
• 8X1T-ACHT
  Start Stage 5 with 500 vitality instead of 180
• 691T-AGHT
  Start Stage 5 with 999 vitality instead of 180
• 8X1T-ACHW
  Start Stage 6 with 500 vitality instead of 200
• 691T-AGHW
  Start Stage 6 with 999 vitality instead of 200
• AM2T-AA4N
  Always have 999 vitality(infinite vitality)