Cheat mode
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: IMPULSE 101 - Give all weapons and ammo. /GOD - god mode. /NOCLIP - walk through walls/fly. /MAP xxxx - go to map xxxx. Here''''''''''''''''''''''''''''''''s the maplist:
Tip:
You're not the only one fighting aliens; the commandos are, too. If you find yourself in a situation that has both aliens and commandos in the same area, pick a nice hiding spot and watch them beat up on each other. When the fighting stops, jump in and finish off the weakened winner.
Tip:
Use security guards as backup. Get up real close to them, and press your "use" key until they say something to the effect of, "You're right, we'll have a better chance together." Once they're following you, they'll engage aliens and commandos at will.
Tip:
Commandos are very smart, and once your position has been compromised, it's on! Not only will they attack you in formation but they'll also lob grenades at you. So don't sit still. A veteran friend of mine once told me that the only way to survive an ambush is to run into it, and the same holds true in Half-Life. Sure, the odds will still suck, but they'll suck less.
Tip
: If you find yourself hurting and in desperate need of medical attention, seek out a scientist. Walk up to him and press your "use" key until he says, "Let me take care of that wound for you." This won't work every time, but when it does, it's a welcome surprise.
Tip:
Every crate or box you see may contain something you need, so break all of them open with your crowbar (except, of course, the ones with explosives labels).
Tip:
The Hazard Course is an excellent resource for learning the moves necessary to make it through the game. Even seasoned players should have a crack at it.
Tip:
As you will learn in the Hazard Course, you can pull crates and boxes into positions so you can use them as tools to get to high places.
Tip:
Save your game often, especially after you've completed a tough area (hit F6 for quick save, F7 for quick load).
Tip
: The crazy scientist-aliens with the crustacean heads and spiny arms are dangerous yet weak and slow. Just one shell from the shotgun should do them in.
Tip:
Switching to software mode should help you to see underwater. Be sure to switch back after you've reached dry ground.
Tip:
Your allies can still be of use even if you think you're done with them. When you no longer need a security guard around, for example, kill him and take his ammunition. But don't do so in front of another security guard: he will instantly become hostile and attack you.
Tip:
At the beginning of the game, a scientist sits in front of a damaged instrument panel. He is impossible to kill, whether you shoot him or beat him with the crowbar. He does produce an impressive amount of blood, though.
Tip:
There is a monster in the power-up stage that is difficult to kill. Try turning on the track generator and waiting for the monster in the generator room. Once he's there, run to the door and then back out the other side. This will electrocute him.
Tip:
Get health in a pinch by diving in the nearest water (not toxic waste) and staying under until the O2 warning flashes. Quickly surface, and you'll get 10-15 health.
