Out of the 5 Bungie games it was by far the worst one imo.
My two biggest issues with that game are the split story (annoying as -blam!-, also terrible) and the health system (really -blam!-ing terrible). Not to mention they nerfed or removed the good weapons and added subpar replacements.
It's a game that I played once because I had no patience for its bullshit.
Maybe I'm just too caught up in Halo CE nostalgia.
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I loved the campaign and halo 2 has one of the best soundtracks of all time. I can't say anything about the multiplayer since I've never played it.