You may have to type "sv_cheats 1" in console first.
The following commands are available in console:
/GOD - god mode.
/NOCLIP - walk through walls/fly.
IMPULSE 101 - Give all weapons and ammo.
/MAP xxxx - go to map xxxx. Map names are of the format c#a#,
(c1a1, c2a1, etc).
See the map list for names of all levels.
/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_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
Single Player Maplist:
----------------------
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
