Suggestions:
Have the vents infested with other alien species:hound eyes, zombie cut off from the stomach down and snarks
Scene: make the scene (where the security guard gets snatched from a zombie in a vent) more scary: make the room light more dark and play the Alfred Hitchcock theme 
Because they’re vents, not hallways! Only headcrabs and crouched humans can fit in them.
And snarks, but they will obviously be in vents because they were in HL.
there’s really not even enough room to swing a crowbar :s
Yep those snarks are bastards to hit with the crowbar.
Hound eyes are just as small and a half decapitated zombie would fit as well. Those vents weren’t that tight.
no
I agree with Ballsopt.
NO.
Cool story, but I have never seen a doglike creature crawling around in a ventilation shaft…ever.
Raccoons on the other hand. Don’t even get me started on those little bastards… :retard:
But you’ve seen crouched humans swinging crowbars in vents?
Mmmm, isn’t there a half-zombie in a vent in Ep2? I honestly could be fabricating that, but I’m pretty sure I remember something to that effect.
Yes I do agree. I do believe a Gonarch should be in the vents.
I don’t see how houndeyes could get themselves into that predicament to be honest.
Unless of course they teleported in there.
Half… decapitated?
Why, it’s Nearly Headless Dick
Here’s the place for suggestions like these:
https://forums.blackmesasource.com/showthread.php?t=22
The half-zombie and the snarks aren’t too bad. The houndeye is just ridiculous.
i liked the gonarch idea
Spawn it yourself.
this^, how about a garg?
Founded in 2004, Leakfree.org became one of the first online communities dedicated to Valve’s Source engine development. It is more famously known for the formation of Black Mesa: Source under the 'Leakfree Modification Team' handle in September 2004.