Halo Annivesary makes a return and with awesome all new visuals!
The Pros: The gameplay in this game is fantastic with the awesome new visuals and you can now play the co-operative (online) now, and it didn't feel like "dated" experience and the covenant are awesome, the weapons are fantastic and one of my favorites is the needler gun.
the cons: there are no cons about this game.
And there are some new additions in this game like: (skulls, kinect feature (i didn't really got into it but its kinda gimmick) And last for not least, the Terminals)
All in All: this is best remake i have ever seen, and i highly recommend that played halo before buying this awesome remake and its really worth the wait.