Without exaggerating, it is my favorite game of all time. It has greatly influenced my art in the time since I played it and I think about the atmosphere very frequently to this day. I have picked apart the lore, characters, backgrounds, maps, models - for 16 years, and still find new details all the time.
It is my comfort game - as strange as that sounds for a horror game about brawling in alleyways. It was divisive but had an incredibly loyal following at one time.
I used to host multiplayer matches for 20 hours at a time and wake up to the grunting, screaming, and crunching noises of people having a great time together. Met several friends on the multiplayer mode who are still with me today.
Whether you love it or hate it - everyone remembers the bear.
Addictive and smooth melee combat, rare for the time. Still feels superior to some other melee-focused FPS games to this day. Memorable villains, incredible atmosphere, consistent art direction, the graphics hold up to this day.
Currently it is only officially accessible on PS3 and Xbox 360, and is not backwards compatible on either console's successors.
I've bought the previous game for several friends, and would gladly gift new copies of this one as well, were it made available for PC.