i played halo mp via xbox and gamespy's xbox tunnel for the longest time and i enjoyed the careful attention to strategy and tactics one would have to observe while playing CTF on BG or hang em high. but onslaught blew it all away. ut2k4 requirse far more skill and just being a more developed implementation of the things halo brought to the table means you have to think more in trying to be successful. halo is a great game but ive naturally gravitated towards ut2k4