Revolutionary for its time.
However, the PC version was much better.
The xbox version had nice graphics but the field of view was miniscule and the annoying fog was everywhere that prevented you from seeing in the distance, and it loaded constantly everywhere you went.
The PC version allowed you to customize your graphics, and it looked sweet. Coupled with the mods you could download the content never ended. There was a million player made mods you could download some were very good. That with the existing content provided hours upon hours of gameplay.
The main questline for the original version was epic in proportion. There was also TONS of other quests to do outside of the main storyline. They released two expansions which added even more.
I'd defenitely recommend this classic game to anyone looking for something a lil retro. The character models and animation leave a little to be desired compared to these days but the game is well worth the time.