This game is pure and simple. If you're a Halo fan, then you NEED to know how it ends. The graphics are much better than those of Halo2 were, it seems theyve made much more use of the console power this time. The storyline is brilliant as ever, and it is NOT just a repeat of the previous games (as Halo2 was of 1).
The new weapons are pretty neat, but you realise that only a few are ever of any use. The campaign is a bit short however, but make sure you wait until the END OF THE CREDITS when you complete it.
Single player alone, this game scores 4/5 for me. But online is where this game really shines. It is supurb, and has hours and hours of entertainment a day packed into it. The element of trash talking has been greatly reduced from Halo2 as you can no longer chat via proximity to an enemy team. There is a wide selection of playlists and game types to choose from, and Guests can play online too. So if you've got 3 mates over, hook em up and take your team online! GREAT FUN.
Overall, a 5/5 game for me. But I am a Halo fan and so, probably biased. =D