in all honesty i think halo 2 is the best halo by far and maybe even the best game ever. I think that with halo 4 if they keep or bring back anything from previous games then they need to bring back the grenade jumping from halo 2 and put as many if not more easter eggs as halo 2 which is what i think made halo 2 the game that you could spend years playing and still find new fun things to do (like finding the scarab gun or the soccer ball:)