Unreal Tournament is one great game!  As far as first person shooters are concerned on the Mac, UT is the champion!  Great graphics, great gameplay... this game has it all.  I originally used this on my iMac 233mhz with a Gamewizard Voodoo2 card installed and it ran fantastic.  Now I'm on the same iMac, but with a 466mhz processor and averaging 40+ frames per second on the game!  There is no real storyline here, but this isn't the type of game that requires one.  This is all about pure action!  The levels that come bundled in with Unreal Tournament are great, but once you start to add on 3rd party levels from the Internet, the game really takes flight.  I have found some incredibly detailed levels that will keep you engrossed for hours on end!  If you want a fun game that can even be played across the Internet then Unreal Tournament is the game for you!