Identification of an early 2000's PC game
 

Hey guys, sorry this is a repost because the previous post's title was misleading.
So I played this game as a demo at the time (not sure exactly when during the early 2000's) so I only remember the first 2 levels.
The game starts in your appartment (or maybe a larger hotel room), and you have no recollection of how you got there. The door is locked via some demonic seal, and you can't escape through the window, so you have to find some other way of escaping. I'm not sure how, but I found my way almost directly from my room to underground sewers, where you see a giant zombie/demon worm thing. It doesn't attack you, but it's just there.

Any ideas guys?
Thanks :D

Figured it out: it was Silent Hill 4