At the Xbox market
if you mean xbox 360, go on to the xbox dash board then to the market place go to add-ons and go to browse and search for the game you want the add on for, you may need Microsoft points for most off the add-ons.
This game is a Xbox original game and therefore cannot get any add-ons.
Sadly, no. I heard that the PC version now has a "Loads of Laundry" add-on to it now. But hopefuly some of those add-ons will start making their way to the Xbox and PS3.
If you like the Xbox 360, will go online and download add-ons for games then yes.
if you bought the add ons on disk just put the disk in and do what it says.
It is Activision that does it because of an agreement with Xbox 360. Treyarch develops the Games and add ons for Activision
no they are not going to make one but they are coming out with a lot of xbox 360 add-ons so it has cooler designs and a lot of enhancements for it
You do not need Xbox Live to play any of the Fallout 3 add ons.
With the points you can buy games, music ,movies, TV shows,things for your avatar, and game add-ons.
Buying game add-ons and Xbox 'perks'.
Because Grand Theft Auto 4 add-ons are Xbox 360 exclusives. Because Microsoft paid for it to be that way.