The following are known Action Replay Codes for Williams Arcade’s Greatest Hits on SEGA Genesis / Mega Drive (Genesis).

The codes should work with the region specified but may work for other regions as well.

Device Compatibility: Action Replay

Defender Codes

• Infinite Lives P1
  FFA2B7:03
• Infinite Bombs P1
  FFA2B9:03
• Infinite Lives P2
  FFA2F4:03
• Infinite Bombs P2
  FFA2F6:03

Defender II Codes

• Infinite Lives P1
  FFB7FE:03
• Infinite Bombs P1
  FFB800:03
• Infinite Lives P2
  FFB83E:03
• Infinite Bombs P2
  FFB840:03

Joust Codes

• Infinite Lives P1
  FF299D:04
  FF299E:05
• Infinite Lives P2
  FF29A7:04
  FF29A8:05

Robotron 2084 Codes

• Infinite Lives Both Players
  FFDB64:02

Sinistar Codes

• Infinite Lives Both Players
  FF1F42:03
• Infinite Sinibombs Both Players
  FF1F5B:04