The following are known Action Replay Codes for Defender on Sony Playstation 2 (PS2). These codes were also known as GameShark Codes and in most cases will work on both devices.

Device Compatibility: Action Replay & GameShark (Version 1 & 2)

Master Code – Must Be On
0E3C7DF2 1853E59E
EE9B66CA BCCC335A

Infinite Lives
CE48A33A BCA9C292

Max Credits
DE48A3C6 C19E7B82

Max Colonists Saved – Stats
C1406BF6 BCA9C292

No Colonists Killed – Stats
C1406A8E BCA99B83

No Mutations – Stats
C1406AFA BCA99B83

Big Kill Bonus – Stats
D1406BDA F7436482

Massive Total – Stats
D1406BDE F7436482