GameSpot is right about this one. I've never seen so much content packed into one game.

User Rating: 9.4 | Unreal Tournament 2004 (DVD Version) PC
The first Unreal Tournament evolved the online frag-fest genre. A few years later it attempted to do it again with Unreal Tournament 2003. Although it was a failure, the game itself wasn't that bad, but could have been much better. And now, the Unreal Tournament series is back with a bang with 2004. I played the demo of this game for no less than 3 hours a day for nearly 3 weeks straight, and I was amazed at just how good it was. The graphics are great, but the gameplay is enough to get your adrenaline pumping. After I managed to get myself un-glued from the demo, I went to the store and grabbed this off the shelves, not stopping to look at the price. I am simply blown away. Assault has returned (being absent from 2003) and is better than ever. The new Onslaught mode, with it's vehicular combat is extremely fun and will leave you wanting more, again and again and again! I have never played such a fun game. This is what Unreal Tournament 2003 should have been.