Pro vkládání kódů musíte hru spustit s parametrem "hl.exe -console". Příkaz /GIVE funguje pouze pokud hru spustíte s parametrem "-hl.exe -dev -console", pak ovšem nebude fungovat kód na nesmrtelnost a přeskakování úrovní. Ve hře potom aktivujte konzoli klávesou [~]. Je možné, že před zadáváním kódů
budete muset v konzoli napsat "sv_cheats 1".

/IMPULSE 101 - všechny zbraně a střelivo
/GOD - nesmrtelnost
/NOCLIP - průchod zdmi
/MAP xxxx - místo xxxx pište toto:
Single player:
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
Multiplayer:
boot_camp; bounce; datacore; lambda_bunker; snark_pit; stalkyard;
subtransit; undertow
Hazard Course:
t0a0; t0a0a; t0a0b; t0a0b1 t0a0b2; t0a0c; t0a0d
/GIVE xxxx - místo xxxx pište toto:
item_airtank; item_antidote; item_battery; item_healthkit; item_longjump;
item_security; item_sodacan ; item_suit
ammo_357; ammo_9mmAR; ammo_9mmbox; ammo_9mmclip; ammo_ARgrenades;
ammo_buckshot; ammo_crossbow; ammo_egonclip; ammo_gaussclip; ammo_glockclip;
ammo_mp5clip; ammo_mp5grenades; ammo_rpgclip
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; weapon_quantumdestabilizer