Serious Sam: The Second Encounter

Serious Sam: The Second Encounter cheat codes: 
During gameplay, press [~] for the console and type any of the
following codes:

Code              Result
please god      - God Mode
please giveall  - Give All Weapons / Ammo
please killall  - Kill All Monster On Level
please open     - Open All Doors
please fly      - Fly Mode
please ghost    - No Clipping Mode
please invisible- Invisibility
please tellall  - View All Messages
please refresh  - Restore Energy