The Controls

First of all I would like to say that you'll have to learn to play the game combining the mouse
and keyboard controls. Sometimes you see people playing the game on their keyboard only,
crunching their fingers in all kinds of impossible ways. The combination of mouse and keyboard
is the best and most easy way to play.

Don't use the default controls of half life! In single player you can do everything at a
slow, relaxed pace. In multiplayer, this will get you killed! eg. the 'R' button to reload
is to far away from your other controls, by the time you have pressed the button, you'll be
perforated with bullets. These are the controls I use:

Mouse --> to aim
* Left mouse button: Fire 1
* Right mouse button: Fire 2
* Wheel: Scroll through weapons

Keyboard:
* Arrow up: Run forward
* Arrow left: Strafe left
* Arrow right: Strafe right
* CTRL: Jump
* SHIFT: Crawl
* ENTER: Use item
* INS / 0: Reload

The other buttons don't really matter that much, unless you don't have a wheel mouse. If
you don't have it, the buttons for the selection of your weapons are important too.
Assign quick keys to the weapons you use the most (and that doesn't always have to be the
gluon gun).

Personally, I don't use the strafe button that much, but it sometimes comes in handy when
you try to dodge the opponent. However ... continually jumping and crawling tends to be more
confusing to the other players than a simple strafe movement, so I prefer this tactic.
(Although I must admit, that sometimes I simply forget to do it, result --> My head gets blown
off).
The best thing you can do off course is to combine the 3 tactics: strafing, jumping and
crawling at the same time. If you can pull this off and still aim you'll be one of the better
players around.

Like I already said, these are the controls I use while playing half life. If you feel more
comfortable using other controls, use them instead of these. This is just some advice for
the rookies out there, who haven't considered the use of alternatice keys.