Odd, I never had any issues playing through the entire game way back in 2004 or so. I remember downloading a level cap remover but can't remember if I even patched my original disc copy or not. It took me a few tries after I first bought it before it clicked with me. Then, a couple years later, I decided to revisit it and I was hooked. I think I finished the entire game in about a week.
The only problem I remember running into was I needed some sort of key to get into some Dwarven caverns for some important quest, but apparently it wasn't part of the main story because I never figured out where to get that damn key (or whatever type of item it was that I needed) and still finished the game. Eventually I came to believe it was a bug that broke that quest.
Anyway, great game, I really liked it. It had some wonky combat and I wasn't super impressed with the end, but the overall experience was worth it to me. I played as a sword-wielding, magic-focused elf, if I remember correctly, and I always thought it would be fun to go back as a gun/rifle-toting dwarf technologist, but haven't gone back for anything beyond character creation and the intro scene.