Prepare to be blown away!!
Graphics, music, gameplay and everything. The brand holder of the name Epic is truly worthy of the name.
The only letdown is the single player campaign which is somewhat confusing.
But other than that, if you plan on playing a game with your friends or online this should be it, no matter the genre of games you prefer to play.
This should be the first game on the list of multiplayer games.
I haven't played unreal tournament 3 yet but I advise you to play this instead if your system can't handle UT3.
I have a 8400GS ( a video card for about 40$) and it works without any problems at around 60 fps.
though other games that were out in that same year work with lower frame rates, etc. halflife2 doom3.
Unreal engine is the best.