The manual claims that several "Special Codes" will be released for Populous 2, to place in the Special Codes box. A quick google has me coming up entry. Does anyone know of any beside MUSIC and ITCHY SCALP ?

Haven't tried it.

Full energy
Enter the "Create Your Deity" screen, load a character, then enter DKNPJAEEMEJMNMFAFDOD as a password. Return to the "Conquest" menu and enter the name of the last level played. Game play will start with full energy.

Maximum power
Enter the "Create Your Deity" screen, load a character, then enter KOPOJAEEMEJMNMFAMEON as a password.

Invincibility
Enter the "Create Your Deity" screen, load a character, then enter ADKISCIESNTPDIDN as a password.

To be the most powerful god, with full power in all:
enter ADKITAKDVGZLRGWZ as the password on the Deity-entry screen.