no there is no online mode on fallout 3 or new vegas
You do not need Xbox Live to play any of the Fallout 3 add ons.
you can get updates for it
From the xbox live marketplace
No
No, there will not be any competitive multiplayer for Fallout 3. It is only single player.
you cannot mod fallout 3 on xbox 360
No, Xbox Live is Microsoft's content and community service. You do not need Xbox Live in order to play any Xbox game.
You need to have an xbox live account. Go to the live marketplace and search the games area. Find fallout 3, and there will be a menu with all the addons you can purchase.
No fallout 3 is not for DS, it is for xbox 360 and PS3
You might have to wait till it comes out on xbox live to download but its not out yet for download
Fallout 3 PlatformsFallout 3 is available for the PC, Xbox 360 and PlayStation 3.
I have Fallout 3 on xbox.