The Mummy Returns

The Mummy Returns cheat codes: 
Press [Esc] to quit game play. Select "Replay Level", and choose the
"Bonus Game Mode" option. Enter one of the following passwords to
activate the corresponding cheat function.

All weapons          - WAWDDSSA
Unlimited ammunition - DSDAWSAS
Unlimited lives      - WWSWDAAD
Unlimited health     - SDWWADSA

Unlimited lives (alternate):
Play through the Anck-Su-Namun's Crypt level, then save the game.
Select to replay the level and collect the extra lives found throughout
the area. Repeat this as needed before continuing.