Half-Life Cheats

You may have to type "sv_cheats 1" in console first. The following commands are available in console:
IMPULSE 101 - Give all weapons and ammo.
/GOD - god mode.
/NOCLIP - walk through walls/fly.
/MAP xxxx - go to map xxxx.
Here's the maplist:

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/Deathmatch: boot_camp ; bounce ; datacore lambda_bunker ; snark_pit stalkyard ; subtransit ; undertow

Hazard Course: t0a0 ; t0a0a ; t0a0b ; t0a0b1 t0a0b2 ; t0a0c ; t0a0d

/GIVE xxxx - give item xxxx.
The following items are available:
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_gaussclip ; ammo_rpgclip ammo_glockclip ; ammo_mp5clip ; ammo_mp5grenades
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 ;