Rainbow Six 3
The best game on Xbox Live as of the date this was written. (Summer 2004) It currently has a sequel/expansion known as "Black Arrow," which is exclusively on the Xbox. Though the single-player campaign on both games are a little "imperfected", the multiplayer is amazing. Sadly, many people are going to ditch Rainbow Six 3 for the newer version of Black Arrow. (stated above)
The lean glitch has been fixed, and the .50 cal rifle has been removed and replaced by a
Dragunov, Black Arrow has something worse than the two problems combined; spawn-killing. 79% and plus players camp at the other team's spawning point and snipe them in the head before the have a chance to even move.
Ubisoft, the game's developer, is working to fix this problem. A good solution is to put a 2-second
invincibility counter on the spawned player. so that he can actually kill the spawn-killer first. All in all, Black Arrow introduces new gameplay modes and maps (including the
downloadable ones from the original Rainbow Six 3) which is not to be overlooked.