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I saw that BUNGIE has a Halo CD server, but I've looked here in the forum and can't find the IP address. BTW, great job on the game. I haven't had this much fun fraggin' noobs in awhile.
D'oh, I just found them under the sticky FAQ. I didn't see them the first time, too much beer!
If by CE you mean Custom Edition, Bungie doesn't have one. As far as I know.If you mean CE as in Combat Evolved, then they have several. Look them up in the Gamespy menu. Or on Xfire.