The lights are on
Whether it's Half-Life's well-polished single-player experience, Left 4 Dead's intense multiplayer mayhem, or the amusing puzzle-like experience that was Portal, it's hard to argue with Valve pedigree, but you can certainly try if you'd like.
Theres this part where I have to kill some sorta horse zombie thing and keeps charging at me and killing me. I shoot it and waste all my ammo but it doesn't die. How do I kill this?
Are you sure your question is for Episode 1. I remember something like that in Episode 2. Let me know for sure. I might be able to answer your question if it's the thing I'm thinking of.
I am pretty sure its episode 1.
Doesn't it go Half Life 2, then Half Life Episode 1, etc?
Not sure but its about an hour after the two leave the subway.