Or because of it’s fast headcrab.
well:if you read on the half life wiki you`ll see that all the scientist actually live in black mesa.Eli lived in black mesa with his wife and daughter
well:if you read the posts above you, you`ll see that this was actually said.More than once too
if I actually did that I wouldn`t have posted this postbangs head in wall for 10 times
fast zombies are faster because the fast headcrab is a better headcrab.
Its faster and more intelligent (controlling the host and organ management 
)
No, they actually DO have implants, it’s all a part of the combine “upgrade”. As for fast zombies, they are the result of fast headcrabs, not normal headcrabs. Zombine are combine with normal headcrabs. If a fast headcrab ever latches onto a combine, then may god help us all. My point is, guard zombies should be a slow as scientist zombies, but I like the idea of having them slightly tougher, cause of the vest an’ junk.
They wont be any tougher. They will be exactly the same, except for the way they look.
Deja vu, guys.
PROVE it. For all you know they have a single chip in their brains to make them subserviant.
However personally I agree that they definately have some kind of mechanical enhancement, but this might not actually make them faster. I mean what if they have a metal ribcage installed to increase toughness? That wouldn’t make them run any quicker.
That thing is pretty much only there to stop them enjoying curries. 
I could kill myself for not remembering that. Even so, doens’t prove that it’s a mobility upgrade.
They do have two fairly large portions of both sides of their brains removed. It seems implied that some sort of electronic device is supposed to go there. It can even be seen in the evolution propaganda poster:
I don’t know about any physical enhancements. Wouldn’t be surprising either way.
I don’t think the combine upgraded mobility or physical strenght of human soldier but more like the stalker, improved maintenance : less consuption (aka food, drink, sleep) and overall reliability (enhance body for extended/longer effort than the average human ; removal of unecessary features like disgestive system ; reproduction organs or self-consciousness)
Graffiti can’t be trusted. They have human heads in-game, after all, and the ‘evolved’ head shapes look transitional between ape and human.
Notice how the fellow in the graffiti has no skin. Those mechanical parts could be sub-dermal.
If you look at the model in-game, there’s little dents in his head where those mechanical brains would likely be.
Thank you for pointlessly repeating what I said Ramirezoid.
The stripped combine in the bed is probably in the transition from fully human to being reshaped like in the propaganda poster.
Somebody probebly alredy said this, but what would be good is to put a laser sight on the mounted machine guns that the milatary use. like on hl2 you can see where the combine are pointing there guns.
The only laser sight that the Combine use are for the sniper rifles. And you wont be able to use any sniper rifles in Black Mesa.