During the game, press [TAB] to open the inventory. Choose the PDA and start it
with [E]. Now press the keys [G] + [0] together.
Code: Result:
3815 Unlimited Health
8745 Full Health
0132 Medi-Kits Double Effect
6422 Double Protection
7663 Double Damage
7018 All Items
8700 All Weapons
8249 Unlimited
4394 100% Aiming
2733 Enemies are Blind
1554 Enemies are Deaf
0926 Moving Without Noise