halo3 odst is an expansion of halo3 the only big difference is that you no longer play as a Spartan you play as an odst.
Halo 3 has custom games, matchmaking and spartans, ODST has firefight, no matchmaking, and ODSTS. Plus, not all of the weapons Halo 3 had.
Halo 3 ODST is at the same time as Halo 3, just that you are playing through the view of different people.
In Halo 3, you play as the Master Chief, the last surviving super-soldier of the Spartan II group. In Halo 3: ODST, you play as an ODST instead of the Master Chief. There are also different weapons in ODST.
Miles was the oldest.
you have to go to halo3 mods .com on google and click on halo3 how to mod
Their isn't any cheats for Halo3
in my opinion halo 3odst
Halo3:O.D.S.T. come out on September 22nd
No you do not have to have halo3 to get halo3 odst.I have heard a few bad reviews of it but most are good so i suggest people should get it.
yes it is the only difference is different cover art
why?
no
no you can not
no