Right-click on your desktop. Click on New / Shortcut.
Type in: C:\SIERRA\Half-Life\hl.exe -dev -console
**That did not work for me but this did;
D:\SIERRA\Half-Life\hl.exe -console +sv_cheats 1
(I installed on my D: drive)
When you put in the CD, exit from the menu that pops up automatically.
Use the desktop shortcut to start the game.
Now type in sv_cheats 1 at the console to enable cheat mode.
Don't exit the program, but restart the game or reload your saved game.
The console is now active in single-player mode and you can input the
cheats.
Press the tilde ~ to bring down the console.
You have to do this each time you start the game from your desktop.
You can't turn on cheat mode if you start from the CD's autoplay menu,
or from the Start menu items installed by the game.
After you open the console with the tilde ~ key, type one of the following:
D:\SIERRA\Half-Life\hl.exe -console +sv_cheats 1
Cheat Codes
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
Note: Use cut and paste features for frequently used cheats
i.e. "/impulse 101" which givesyou a little of everything.
"I borrowed my stepwife's"
After you type in the sv_cheats 1 line and hitting return, you have
to resume your game until you hit the next map. Once that happens,
you can open your console and type in whatever cheat code you want
to use, and it'll work.
Frank