The animation during the fighting sequences are all very smooth and well done. The game really looks good when you are fighting an enemy. Effects like blurring of the arms or legs all add to the coolness of the graphics. While it doesn't look as good as Tekken 3 for PS2, it does look good considering previous fighting games on the PC have been less than stellar. Sound quality is a plus in this game.
Music is used only on occasion, but it fits in well.
Where the game really excels is the voice acting. No One Lives Forever before it, Oni continues the trend of top quality voice acting and meaningful dialogue. It is so much better than games that came out just last year. The game starts off by putting you through a crash training course. You learn many useful things here.