The following are known Game Genie Codes for Space Invaders ’91 on SEGA Genesis.

• Start With 1 Shield On 1st Credit
  AE3A-AAEW
• Start With 3 Shields On 1st Credit
  AN3A-AAEW
• Start With 7 Shields On 1st Credit
  A63A-AAEW
• Start With 9 Shields On 1st Credit
  BE3A-AAEW
• Start With 1 Shield Instead Of 5 After Continue
  AE6T-AAF8
• Start With 3 Shields After Continue
  AN6T-AAF8
• Start With 7 Shields After Continue
  A66T-AAF8
• Start With 9 Shields After Continue
  BE6T-AAF8
• Almost Infinite Shields
  AJ9T-AA60
  BBAT-AA86
• Start At Round 2: Milky Way
  9T3A-BGMY
  963A-AAD2
  AE3A-AAD0
• Start At Round 3: Merutas
  9T3A-BGMY
  963A-AAD2
  AJ3A-AAD0
• Start At Round 4: Planet Dufa
  9T3A-BGMY
  963A-AAD2
  AN3A-AAD0
• Start At Round 5: Moon
  9T3A-BGMY
  963A-AAD2
  At3A-AAD0
• Start At Round 6: Planet Venus
  9T3A-BGMY
  963A-AAD2
  AY3A-AAD0
• Start At Round 7: Planet Solaia
  9T3A-BGMY
  963A-AAD2
  A23A-AAD0
• Start At Round 8: Planet Lisubi
  9T3A-BGMY
  963A-AAD2
  A63A-AAD0
• Start At Round 9: Planet Guraivas
  9T3A-BGMY
  963A-AAD2
  BA3A-AAD0
• Start At Round 10: Planet Mars
  9T3A-BGMY
  963A-AAD2
  BE3A-AAD0
• Start At Round 11: Planet Mercury
  9T3A-BGMY
  963A-AAD2
  BJ3A-AAD0
• Start At Round 12: Planet Aluga
  9T3A-BGMY
  963A-AAD2
  BN3A-AAD0
• Start At Round 13: Planet Laia
  9T3A-BGMY
  963A-AAD2
  BT3A-AAD0
• Start At Round 14: Planet Bailam
  9T3A-BGMY
  963A-AAD2
  BY3A-AAD0
• Start At Round 15: Planet Daruta
  9T3A-BGMY
  963A-AAD2
  B23A-AAD0
• Start At Round 16: Planet Lamusa
  9T3A-BGMY
  963A-AAD2
  B63A-AAD0
• Start At Round 17: Planet Ikuru
  9T3A-BGMY
  963A-AAD2
  CA3A-AAD0
• Start At Final Round: Doriasta
  9T3A-BGMY
  963A-AAD2
  CE3A-AAD0
• Super Crusher Lasts 30 Seconds
  GBRA-AABR
• Use Hyper Laser 9 Times
  BFRA-AABC
• Buster Laser Has 800 Energy
  ABRA-ATBG
• Use Homing Bombs 40 Times
  JBRA-AABE