Very awkard game pace.
Controls doesn't feel good, it's supposed to be a fast pace FPS, but there are a lot of goodies collecting mechanics (souls, gold, secrets, etc) that slows the game pace a lot.
Story telling is almost non existant, so it is not good as a story driver fps.
You will make some weird jumps when try to collect items nearby object (even broken ones) that may result in loss of life.
Maybe this last problem is due to modern OS (I didn't remember of them back in the days, but I also played this game little to none at the time), but I feel like this is not an FPS anyone would play in these modern days.
Use your time on something else, it would be much more worth it.