well this cant be answered but there probably will be :]
Halo ODST is coming out September 22 2009 (i believe)and Halo reach is coming out fall 2010
halo 4 is coming out and check on youtube or ign for more information
no there is just Halo Combat Evolved, Halo 2, Halo 3, Halo:ODST, Halo Wars, and they are working on Halo Reach and the multi player beta for Reach is coming out on May 3rd.
they were going to make one but they made halo reach instead
This is a difficult question to answer, because Halo: Reach is coming out but Bungie is not sure to release it or not. But there will not be a game with the exact title Halo: 4. But there will be a Halo "4" but replace 4 with Reach.
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.
no, this is just the last halo game from bungie. other halos will be done by 343 industries. halo 4 is coming out 2012 november-december & apparently it is going to be the best halo.
its already out
If your talking about the title then no. But if you mean like the 5th Halo game the I guess you can count Halo: Reach as the fifth and that comes out sometime fall 2010.
There will not be another Halo game after Reach.
after halo reach, bungie will not be creating another halo title, although there may be another company to make a different halo game (like halo wars)
Never