The following are known Action Replay Codes for Mace: The Dark Age on Nintendo 64 (N64).

Device Compatibility: Action Replay & GameShark

Player 2 Infinite Energy
8008AEFF 0064

Player 1 One Hit Death
D008B287 0064
8008B287 0001

Player 1 Infinite Energy
8008B287 0064

Player 2 One Hit Death
D008AEFF 0064
8008AEFF 0001