Во время игры нажмите клавишу [~] (тильда), затем вводите следующие коды:

/God          - неуязвимость
/God 0        - отключить неуязвимость
/ Noclip      - хождение сквозь стены
/impulse 101  - все оружие и патроны
/Map <карта>  - выбор карты в режиме одиночной игры

Названия карт следующие: 
c0a0; c0a0a; c0a0b; c0a0c; c0a0d; c0a0e; c1a0; c1a0a; c1a0b; 
c1a0c; c1a0d; c1a0e; c1a1; c1a1a; c1a1b; c1a1c; c1a1d; c1a1f; 
c1a2; c1a2a; c1a2b; c1a2c; c1a2d; c1a3; c1a3a; c1a3b; c1a3c; 
c1a3d; c1a4; c1a4b; c1a4d; c1a4e; c1a4f; c1a4g; c1a4i; c1a4j; 
c1a4k; c2a1; c2a1a; c2a1b; c2a2; c2a2a; c2a2b1; c2a2b2; c2a2c; 
c2a2d; c2a2e; c2a2f; c2a2g; c2a2h; c2a3; c2a3a; c2a3b; c2a3c; 
c2a3d; c2a3e; c2a4; c2a4a; c2a4b; c2a4c; c2a4d; c2a4e; c2a4f; 
c2a4g; c2a5; c2a5a; c2a5b; c2a5c; c2a5d; c2a5e; c2a5f; c2a5g; 
c2a5w; c2a5x; c3a1; c3a1a; c3a1b; c3a2; c3a2a; c3a2b; c3a2c; 
c3a2d; c3a2e; c3a2f; c4a1; c4a1a; c4a1b; c4a1c; c4a1d; c4a1e; 
c4a1f; c4a2; c4a2a; c4a2b; c4a3; c5a1

/Give <предмет> - получить любой предмет 

Список предметов: 
Ammo_9mmar 
Ammo_9mmbox
Ammo_9mmclip
Ammo_argrenades 
Ammo_buckshot
Ammo_crossbow
Ammo_egonclip 
Ammo_gaussclip 
Ammo_glockclip 
Ammo_mp5clip 
Ammo_mp5grenades 
Ammo_rpgclip Item_airtank
Item_antidote Item_battery 
Item_healthkit Item_longjump 
Item_security Item_sodacan
Item_suit Weapon_357 
Weapon_9mmar 
Weapon_9mmhandgun 
Weapon_crossbow 
Weapon_crowbar 
Weapon_egon 
Weapon_gauss 
Weapon_glock 
Weapon_handgrenade 
Weapon_hornetgun
Weapon_mp5
Weapon_python 
Weapon_rpg
Weapon_satchel 
Weapon_shotgun 
Weapon_snark 
Weapon_tripmine