Gamecube obviously and unfortunately only has 3 LAN play games, and only the Phantasy Star games for online play. The new Star Fox *may* have LAN play, but there's no certain plans currently.

But there's a huge collection of LAN and Online games for XBOX and PS2. What I want to know is what your personal favorite games are in these categories on the two systems. Halo is the extent of my X-Box experience, but I'm sure there's plenty of other good games.