Start the game at the DOS prompt and 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
No clipping mode /noclip
Opponents ignore character /notarget
All weapons and ammo /impulse 101
Map select* /map (map name)
Obtain item** /give (item name)
* Select a map name from the following list.
** Select an item name from the following list.
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.
