halo 4 is coming out in november 2 2012.
Halo 3 odst will be coming out September 22 09 iv preordered at ebgames to get sgt Johnson!!
You won't be able to download/get any Halo: ODST demo's, the game is coming out in a few days.
It has already been released. Halo: ODST was released Tuesday 22 September 2009.
Halo ODST is coming out September 22 2009 (i believe)and Halo reach is coming out fall 2010
No Halo 4 will not be coming out with a new story line but their is Halo ODST and Halo Reach and If you Buy Halo ODST you will be able to try halo Reach which comes out in 2010.
Halo 5 does not exist retard,although there is HaloWars, and Halo ODST coming out soon.
After odst none that i know of
The HALO REACH multiplayer beta is coming in May. When it does come out put your Halo 3 ODST game disk in and in should be on the Disk menu.
22 - sep - 2009
Some time in september...
Halo 4 won't come out, get it in your heads. Only Halo 3: Odst is coming out on 2009. Halo 3 is last of the Full game halo (series)