OK so I played this game alot as a kid and I've been looking for it all over the internet for the past few years with no success, but maybe I'll get lucky here
Sadly, I don't remember much. I'm pretty sure it was a PC horror game, a third person shooter with a male protagonist and the enemies were vampires or demons or zombies (or maybe even humans), I'm not sure about this, I just know they were human-sized and the player killed them with a gun. The thing I remember the most was a cutscene at the beginning of the game, which was in a church and I think it was a wedding (not sure, might have been something else) with the protagonist in it. It was in 3D and the graphics weren't bad, so I don't think it was made before 2000, but it definitely wasn't after 2010, so somewhere inbetween that. Also if I remember correctly, most of the game happened somewhere underground or in a building, I remember going through halls and doors and rarely outside. Also the loading screen was some kind of a huge mutated monster with tentacles or something, I think.. I remember nothing about the plot, since I'm not a native english speaker and the game was fully in english which I didn't understand back then.
If someone knows, please let me know, I'm dying to find it :<