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

• High Protection
  R03A-861A
  Note: Some things can still kill you.
• Infinite Time Bombs Once At Least One Is Awarded
  AW9T-8A78
• Energy Capsules Worth 1/2 Normal (1 Unit)
  BC2A-8AH2
• Energy Capsules Worth 2X Normal (4 Units)
  EC2A-8AH2
• Don’t Get Thrown Back When Hit
  9G2T-860Y
  B82T-8AG0
  RL2T-9FR2
• Changes The Intro And Title Screen Music
  AKMA-CN42
• You Can Still Play When You Run Out of Health
  KL3A-8R6C
• Infinite Health
  B43A-8N80
• Infinite Health
  A43A-8R88

When using the next codes, some Time Bombs may do no damage.

• Time Bombs Awarded 1 At A Time, Maximum 9 Allowed
  AG2A-8AG0
• Time Bombs Awarded 2 At A Time, Maximum 9 Allowed
  AL2A-8AG0
• Time Bombs Awarded 5 At A Time, Maximum 9 Allowed
  A02A-8AG0
• Time Bombs Awarded 9 At A Time, Maximum 9 Allowed
  BL2A-8AG0