So far ODST has just taken off and i think its a lot bigger than any one of the other Halo games. This is proabably due to the fact that a totaly **** Halo game (Halo Wars) came out after the end of the story with the master chief and there was a kind of lame downer moment for Halo.

All i can think of is that Halo fan boys are really...easily tricked, this could have been microsofts plan all along.

Halo 1,2,3 and Halo Wars were not that great but i think ODST may be the one in the Halo series that stands out and is what makes Halo worth playing.