Tough to say. I know there were some good games on the Gamecube, but I never owned one and Xbox did great for Halo as I had so many LAN parties with Halo and Halo 2. Got to the point that I was working with my small local gaming community to set up public LAN parties. Probably hundreds of hours on both games. There were a few other good exclusives too I'm sure, I just don't remember them as much anymore. Kinda in comparison, I can think of more good exclusives on the Gamecube like Wind Waker, Resident Evil 4 (Till it went to the PS2), Animal Crossing, Super Mario Sunshine (A game I didn't appreciate till later on), and a few others I didn't play, but are well liked, and it was already pointed out with things like the game boy player which allowed people to play handheld games on the TV which is a nice feature. Wave Bird was also a fantastic controller, though the Xbox S Controller fixed a lot of issues the Xbox had lol