The following are known Game Genie Codes for Terminator 2: Judgment Day on SEGA Genesis.

• Start With Primary Power Supply At 75%
  ZA7T-DPDE
• Start With Primary Power Supply At 50%
  ZA7T-CJ5E
• Start With Primary Power Supply At 25%
  ZA7T-DEME
• Start With Primary Power Supply At 10%
  ZA7T-DJDE
• Start With Secondary Power Supply At 100%
  3C0T-HP0J
• Start With Secondary Power Supply At 75%
  W40T-HP0J
• Start With Secondary Power Supply At 25%
  GL0T-HP0J
• Start With Secondary Power Supply At 1%
  AL0T-HP0J
• Protection From Gunfire
  BJ6T-CA4E
• Extra Ammo Worth 0 Rounds
  AAKA-CABW
• Extra Ammo Worth 50 Rounds
  GJKA-CABW
• Extra Ammo Worth 250 Rounds
  9JKA-CABW
• Extra Ammo Worth 500 Rounds
  8TKA-CCBW
• Extra Ammo Worth 999 Rounds
  66KA-CGBW
• Infinite Rounds
  AtGT-CA80
• Start On Level 2 (John’s Home)
  ALZA-AAHC
• Start On Level 3 (Mall)
  AWZA-AAHC
• Start On Level 4 (Hospital)
  A4ZA-AAHC
• Start On Level 5 (Compound)
  BCZA-AAHC
• Start On Level 6 (Dyson’s Home)
  BLZA-AAHC
• Infinite Energy While Riding The Motorcycle
  AXFA-AA5N
• Protection From Explosions
  AJXA-CA98

When using the next 3 codes, do not use Medicine when you are on Secondary Power.

• Medicine Worth 0% (Normally 15%)
  AAKA-CADT
• Medicine Worth 50%
  NTKA-CADT
• Medicine Worth 100%
  3AKA-CADT