best and only old school multiplayer shooter left, there are so many good things about it, its blazing fast pace will put cod4 to shame, there are health bars (tired of stupid regenerating health), you can carry a truckload of munitions (including a fly by wire shoulder launched nuclear missile), there are many many many maps and mods, the value is unsurpassed by any game to date. and did i mention it really REALLY feels like a tournament blood sport, with the announcer spitting out lines to everyone what is happening around you (my favorite is HEADSHOT or HOLY S***), it also is a reprieve from the depressing emo grayathon games of this current generation, it is colourful and outrageously beautiful, THE BEST GAME EVER, EVAR!!!!! plus you can run on old crappy stutterfest machines (i used to lan this on an old Pentium II machine till 2007), and on linux
as a ctf(capture the flag)-instagibber i cant say much about the hole game, but ig in ut2004 is legendary and far better than in ut3 (tbh never played ut99), in particular the translocator in combination with lowgravity on the only two maps u just have to love: FaceClassic & Bridge of Fate. ofc "normal"-gravity isnt that bad too :p , but not totaly my taste.
Simply the BEST of the BEST of the 'UNREAL' series of games. It may not have the graphics like its newer brother 'UNREAL TOURNAMENT 3', but <imo> still the best out of the lineup when it comes to the fun factor!