No problem mate.
Bah. That’s stupid. Don’t you know that Gordon’s Beard protects against head-shots, radiation, burns, headcrabs, and any other threat? That means they can’t put a helmet on. The beard won’t allow it. You all should know this.
:hmph:
Many of you have seen a game called Crysis, right? 
So if they could run faster, be stronger etc because of a suit then why the HEV suit couldn’t do the same thing for Gordon? Chemical reactions with a persons body and you have speed and sight (by deforming eye’s lens for example).
HUD? Do you have this suit on? No, Gordon has. Who said that he actually SEES it?
If HEV’s altering his body to increase his speed then why couldn’t it alter it in a way that he “feels” or just “knows” these things? It’s just a method of showing this data to the player, nothing more.
Protection against radiation/burns/head shots? They (probably, don’t remember if they were in the game) mastered force fields. The HEV has a little backpack thingy that could give enough power to sustain such a field (like an invisible bubble around his head). The suit has kind of a “collar” so you can guess where it’s generated from ;P.
Of course these are just my thoughts, I might be wrong ;P.
Also don’t read too much into my english, It’s not my main language… 
Your English was fine. Also those are decent ideas, but it’s just one of those things VALVe does and we’ll probably never have an actual answer.
Because it’s a remainder of the days when Gordon was still known as Ivan the Space Biker.
Ivan’s sheer awesome made him see his health, armor, ammo, etc… burned onto his retina.
My guess is that Gordon has in fact got 20/20 vision, but the HUD suite is built into glasses that are attached some way to the suit.
Its either the glasses or this
It still a fucking game.
You’re trying to explain the future with current technology - wrong…
No way :O. And I thought we were talking about real stuff in the real world… Throw rationality away, let the magic flow through you and spam about pointless stuff with us man .
The future? What? Half-Life is definitely in the past now, as it took place in 200X.
But what Fong said, for fuck’s sake.
ITS A FUCKING GAME ITS NOT PERFECT!!! there’s your explanation, short sweet, and simple
Projecting onto his glasses is stupid. That’s like trying to watch a movie projected on a window. Projecting out of his glasses makes much more sense.
ya but that doesn’t explain how he can zoom in on stuff I mean how would projecting images in front of his glasses let him zoom into things.
The pistol isn’t cocked. Don’t worry, she’ll be fine. 
But, what if she click the loader before pulling the trigger???:fffuuu: "Wrong!!!"boom
Ammo for what, exactly…? :terror:
Don’t worry about it.
Ammo for USP pistol in Counter-strike, think again, if you gonna wonder why there is hud in half-life, then why don’t you think about why there is hud in Counter-strike?
My guess is that he’s only pictured on boxarts not wearing the helmet, but in-game, he wears it all the time. We see everything from Gordon’s point of view, so, as far as we know, he could be wearing it constantly, with the HUD projected through the glass (that of the helmet, not the glasses). But then: how come we don’t see the helmet before putting the suit on? Maybe it just folds up around his head from the back all Transformers-like. Sounds plausible to me.
My other theory is: electronic telepathy. The suit is kind of electrically “plugged” into his brain so it displays his health condition, armor level and ammunition in his eyesight.
But then again, it’s a video game, so… I guess it’s debatable. :freeman: