Anyone who doesn't like this game, doesn't appreciate a good game, and most likely lacks the attention span to enjoy it!
Anyone who has read one of these reviews under 8.5, and has agreed with it, is making a serious mistake. Take my advice I own all of the worthy games on all of the consoles, and Halo 2 easily ranks among the best. Don't let someone who scored this game low change your opinion about buying or renting this game, you will be sorry if you do! These few people who don't enjoy this game probably are lazy, and due to thier tremendous egos and such, problably just ran through the game on easy and called it quits, withiut taking any time to enjoy the awsome graphics, and fighting sequences. You don't know fun until you have done an entire run-through on legendary, or have played a 16 player online match.
If you are looking for a great game to enjoy for weeks, then go out and buy Halo 2, trust me it's worth it.