Half-Life Codes -

Cheat mode:
Load game with the command line: hl.exe -dev -toconsole. Then, press ~ if the orange text on the screen does not disappear. During gameplay, press ~ to display the text prompt and type in sv_cheats 1. Press ~ and enter one of the following console commands to activate the corresponding cheat function.

Effect	Code
God mode.	/god
Adjust gravity	sv_gravity <-999 - 999999>
All weapons and ammo	impulse 101
Developer mode on	developer 1
Verbose developer mode	developer 2
Developer mode off	developer 0
Suicide	kill
Map select1	/map <map name>
No clipping mode	/noclip
Obtain item2	/give <item name>
Opponents ignore character	/notarget
Third person view	/thirdperson
Return to first person view	/firstperson
Auto-reload enabled	+reload
Auto-reload disabled	-reload
See things brightly without flashlight	lambert -1.0001
HEV suit, weapons, and ammo	impulse 101
Spawns gibs and blood	impulse 102
Monster stats, while looking at monster	impulse 103
List global entities	impulse 104
Silent player	impulse 105
Model/sprite stats, while looking at target	impulse 106
Texture name, while looking at object	impulse 107
AI node information	impulse 195
AI node information	impulse 196
AI node information	impulse 197
AI node information	impulse 199
Delete monster or NPC from world	impulse 203

Map Name List:

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

Item Name List

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

Monster creation:
You must be within the loading area of the desired monster for this cheat to work. For example, you cannot load up Barney while fighting the Nihilanth. Enter give and the corresponding monster will appear. Note: Activate the /noclip first, or you will be stuck inside the monster.

People
monster_human_grunt
monster_barney
monster_scientist
monster_generic
monster_gman

Monsters
monster_sentery
monster_headcrab
monster_alien_slave
monster_alien_grunt
monster_bullchicken
monster_zombie
monster_apache
monster_ichthyosaur
monster_bigmomma
monster_barnacle
monster_tentacle
monster_gargantuan
monster_nihilanth
monster_houndeye
xen_tree
xen_spore_small
xen_spore_medium
xen_spore_large

Corpses
monster_barney_dead
monster_scientist_dead
monster_hevsuit_dead

Cheat mode (alternate):
Start the game with one of the following command line parameters to activate the corresponding cheat function.

Effect	Command line parameter
Press ~ during game play to activate console	-console
Alternate latency display in v1.0.0.8 or later	-numericping
Bypass opening FMV sequences	-nointro
Disable dial up networking box during LAN play.	-noip
Disable DirectSound	-wavonly
Disable IPX errors during LAN play	-noipx
Enable developers mode	-dev
Force amount of RAM available to game	-heapsize <bytes>
Windowed game play screen	-startwindowed

Key binding:
To activate codes easier, bind them to keys. For example, type bind v "impulse 101" at the console window to bind the "HEV suit, weapons, and ammo " code to the "V" key.

Zoom on every weapon:
Get the Crossbow in single player mode and do a quick save with the weapon that you want to zoom in with. Change to the Crossbow and zoom in, then quick load and your other weapon will be zoomed in. You can now change weapons and they will all be zoomed in. To come out of zoom, change back to the Crossbow and press the second fire button until it zooms out again.

Hint: Completing We've Got Hostiles quickly:
As soon as you enter the "We've Got Hostiles" level, turn to your right and use the noclip code to float through the glass window with the security guard being eaten by the zombie. When you are in there, press the switch that opens the Silo and the Silo door will open. Float back out of the room, disable the noclip code, then go through the Silo door to start the next level.

Hint: HEV suit falls out:
Enable the impulse 101 code while in mid-air and an error saying the hev suit has fallen out will appear.

Hint: Starting tips:
After the "accident", you will discover a scientist giving CPR to a security guard. Wait 15 to 20 seconds to see the outcome, which usually results in the security guard being revived. He is not useful at this time, but return to him after getting the crowbar. Kill him with the crowbar so he can not fire back to get his gun and ammunition.

Soon after this, you will ride an elevator upward. Have the gun ready. Shoot the monster attacking the security guard; a couple of shots should do it. This security guard can cover you until you reach the main entrance area.

One important tactic in the early game is to use your "allies" to your advantage. When you no longer require the services of a security guard, kill him and take his ammunition. A scientist is also useful in drawing enemy attack. Be careful not to harm an ally when another security guard is present, as he will attack you. Also be aware that monsters can sense your allies; and even if you crawl, monsters can hear your allies' walk.

The beginning of the game also has the following glitch. There is a scientist sitting in front of a damaged instrument panel, in the area of the first scientist who opened a door for you. This scientist is invincible. You can shoot or beat him with a crowbar, and all he will do is whine. This also saturates the area with a large amount of blood.

Hint: Rocket:
In the "Apprehension" level, you will reach a part where you go through two red doors reading "CAUTION" that lead into an area with a large sunken in area, two military officers, and a turret gun. Kill the two officers (you can use the turret gun if desired). Then, turn and face the direction opposite the wall with the door and the large window. Enable the "No Clipping" code and walk forward through the natural wall. You will see a large yellow shaft. When you get closer, you will see a huge rocket inside.

Hint: Spawn Grunts:
Enable cheat mode, then use the impulse 76 code to activate the Grunt-O-Matic. A message to start a new game in order for it to work will appear. If you want to continue where you currently are, just quicksave, then quickload the game. Once you have quickloaded, type in the code again to spawn a Grunt. Note: You must have the nocliping code on before you spawn the grunt because he will be spawned close to you. If this is not done, a message stating that the monster spawned is stuck in a wall may appear and the game will end. Do not spawn the Grunt in a closed position or the same message will appear. The Grunt you spawn will see you as a hostile. To have more fun, use the /notarget code and spawn a number of grunts to do your alien hunting.

Glitch: Cheats on first level:
If the all weapons and ammo cheat code is used in the first level of the game, on the train, an error message stating that the hev suit fell out of level will appear. The game will automatically quit.

Glitch: Changing voice:
There is a deep voiced scientist in level 1, in the room before the test chamber. When you ask him to go with you he will have a high pitched voice.

Glitch: Talk to dead man:
After the accident, when you go to the area where there is a scientist sitting on the floor and another is comforting him, enable the impulse 101 code. When the man that is sitting down is talking, beat the standing man with your crowbar until he dies. When the old man is done talking, the dead man will talk to you.