The first thing you ask yourself when you see this game on Steam: What the HELL IS HEADCRAB FRENZY?
I answer: A dynamic action game whose main objective is to kill all the Headcrabs until the time runs out
"Oh, well, since it's like that, easy, I'll use my weapons, jump and do obstacles to finish it off"

Wait a minute... as far as I remember, there's no jump button there, and mainly you only have the crowbar to kill the Headcrabs!

It's NOT even that easy, the chances of you taking damage and dying are almost 50%
It has maps, achievements and an online mode that is really fun!
This game is excellent for those who want 100% in achievements and want to party online!
It deserves more attention nowadays, give it a chance!