The following are known Action Replay Codes for Pipe Dreams 3D on Sony Playstation (PS1).

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

Device Compatibility: Action Replay, CodeBreaker & GameShark

L1 For Extra Lives
d00d2dcefbff
8010d2100010
d00d2dcefbff
8010d1e00010
d00d2dcefbff
8011a6c80010