The following are known Action Replay Codes for Zombie Revenge on SEGA Dreamcast (Dreamcast). These codes were also known as GameShark Codes and in most cases will work on both devices.

Device Compatibility: Action Replay & GameShark

Infinite Credits
3BA136C2
00000005

Stop Arcade Timer
7C75C181
00000D9F

High Score
4A5A10DB
0000FFFF