Half Life
 
 Cheats:
 Update by: Joshua 
 
 Start Half-Life using "hl.exe -console".
 You may do this by modifying the windows shortcut 
 properties for Half-Life and adding "-console" to 
 the end of the "Target" (or file to run). 
 
 The /GIVE command works if you start the game with 
 the -dev -console parameter, and that the God mode 
 cheat and map change cheat only work with the -console
 parameter.
 
 This will let you access the console using "~" key.
 
 You may have to type "sv_cheats 1" in console first.
 The following commands are available in console:
 
 /fly - flying mode
 /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
 
 Multiplayer/Deathmatch:
 boot_camp ; bounce ; datacore
 lambda_bunker ; snark_pit
 stalkyard ; subtransit ; undertow
 
 Hazard Course:
 t0a0 ; t0a0a ; t0a0b ; t0a0b1
 t0a0b2 ; t0a0c ; t0a0d
 
 Killing the last boss: 
 When you get to the level "World's Collide" you will be close 
 to the head boss. The head boss is called a Gene Worm,and to 
 kill him you must shoot his eyes out with the 2 mounted laser 
 guns. When both eyes are shot out his stomach will open up and 
 a large,pink,orb will show. Repeatedly shoot the orb until his 
 eyes come back and then repeat the steps of shooting his eyes 
 and the orb until he dies. 
 
 Opponents ignore you:
 Enable Cheat mode. Then press ~ (tilde) and enter "/notarget" at 
 the console window. 
 
 Secret Scientist Message:
 
 Start Half-Life with the following parameters: 
 Hl.exe -console -toconsole -dev
 You should see a constant flow of text for everything you do.
 Use a low damage weapon on a scientist, and then run after him. 
 Once he is trapped somewhere click the 'Use' key on him. 
 The text should say something like "I won't follow you, you evil 
 man".
 
Third Person:
Firstly, activate the console. Then, by pressing ` during your game you will bring 
up the console. Type in /thirdperson into the console. You can now play Half-Life in 
the third person instead of the first person.

Change Your Character:
Firstly, activate the console. Then, start up the game and go to Multiplayer. Then, 
go to Customize. Then, change your player model. Then, play the game and bring 
up the console and type in the third person command into the console. You will 
now see that your player has turned into the player model of your choice!

Get A 9mm AR Automatic Weapon & Grenades:
Activate the console, then type /give weapon_9mmAR and then press "enter". That 
gives you an automatic 9mm AR weapon. To get grenades also, type /give 
ammo_ARgrenades (AFTER you have got the 9mm AR) and then press "enter". 
You will now have an automatic 9mm AR with grenades. 
 
Parameter Codes:

To enter these codes you must edit the Half-Life icon on your START menu. 

Right-click on the START icon on the Windows task bar. 
Click on OPEN. 
Find the Half-Life icon and right-click on it. 
Click on PROPERTIES. 
Add the desired parameter to the end of the field that says TARGET or CMD_LINE. 
For example, to enable developer's mode you would change the line to 
read: "C:\Sierra\Half-Life\hl.exe -dev" 
Without further ado, we bring you the codes: 

-console 
Enables the console. To access it, press tilde (~) while playing. See "Console 
Codes" for information on using the console. 

-dev 
Developer's mode. Enables the console and displays debugging information while 
playing. Useful if you're having technical difficulties and want to find out why. 

-heapsize x 
Tells Half-Life how much RAM (memory) it can use. For example, if you want it to 
use 32Mb of RAM then enter the parameter "-heapsize 32768". CAUTION! Do not 
request more memory than your computer has. 

-nointro 
Skip the introduction movies. 

-noip 
Removes the D.U.N. box for playing on LAN's (local area networks.) Remove this 
command whenever playing on the internet. If you don't you won't be able to play 
on-line. 

-noipx 
Use this if you receive an IPX error when playing on a LAN. 

-numericping 
Replace's the Half-Life server browser's "green dot" latecy info with real numbers. 
Only available in v1.0.0.8 or later. 

-startwindowed 
Start Half-Life in window instead of fullscreen. 

-toconsole 
Immediately loads the console when Half-Life starts. 

-wavonly 
Disables Direct Sound and plays SFX in wav files. Try this if your sound card 
stutters or you don't have DirectSound drivers. 

-Quick Weapon Reload 
First of all, this only works for weapons with slow reload times, like the magnum 
and the tranquilizer crossbow. Upon running out of ammo in your clip, you will 
begin to reolad your weapon. If you want to fire faster, simply changes your 
weapon while in the reloading animation, and then switch back to the weapon you want to use, and realoading will be complete.