The following are known Action Replay Codes for Namco Museum Vol. 3 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

Infinite Lives – Dig Dug
801254180002

Infinite Lives – Galaxian
8010ec040003

Infinite Lives – Ms. Pac Man
801359600002

Infinite Lives – Phozon
80168d4c0302