In the game press [F9] and type in the following cheat codes:
god - Unlimited shields
allweapons - All weapons activated
allammo - Unlimited weapon supplies
load level xx - Go to level xx
killall - Kill all enemies
gravity - Gravity OFF/ON
In the game press [F9] and type in the following cheat codes:
god - Unlimited shields
allweapons - All weapons activated
allammo - Unlimited weapon supplies
load level xx - Go to level xx
killall - Kill all enemies
gravity - Gravity OFF/ON
Unlimited shields!!!