Hint: 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.
Hint: 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.
Hint: 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.
Hint: 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.
Hint: 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
Hint: 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.
Hint: 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.
Hint: Save your game often, especially after you've completed a tough area (hit
F6 for quick save, F7 for quick load).
Hint: 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
Hint: Switching to software mode should help you to see underwater. Be sure to
switch back after you've reached dry ground.
Hint: 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.
Hint: 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.
Hint: 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.
Hint: 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.