Cheat mode:
Press 9 during game play, then one of the following codes to
activate the corresponding cheat function. A sound will confirm
correct code entry.

EffectCode:
Toggle God modempgod
All guns and full ammunitionmpguns

Invincibility:
Note: This procedure involves editing a game file; create a backup
copy of the file before proceeding. Use a text editor to edit the
"autoexec" file in the game directory. Change:
"PlayerTakeDamage" "1"
to…
"PlayerTakeDamage" "0"
Note: The Spotter can still be killed.