go onto Halo 3 then sign into the live account then push the middle button and select the icon that says marketplace and select any maps/trailers/map packs that are free or even get Microsoft points and buy map packs and maps that are very fun to play on but be careful some maps and map packs will become free when newer versions come out...
the heroic map pack did this very thing...
-cromepizzza-
If you have xbox live you can.
You have to have Xbox live, and you download the maps.
What you have to do is for the Xbox 360 you have to connect to Xbox Live then you have to get Microsoft points and download the maps but most of the maps are free.
You get on Xbox Live then press start in Halo 3. You should see Marketplace. Look in Marketplace and pick which maps you want to download. Then download them.
play sonic in halo just download and the maps change
on bungie, when you find the map you want, que it for download and when you next log onto halo 3 xbox live on your 360 it will automatically download.
easiest way is to download them through xbox live or get a bonus map pack in stores
When on Halo 3 in Pre Game lobby you press start and chose Xbox Marketplace. From there you can download the maps and other Halo 3 content.
you cant >:(
yes and no. You can play all the maps in the halo 3, but you have to download the rest.
You must go to the XBOX LIVE Marketplace for Halo 3 and download the maps and map packs. But some will cost you with Microsoft points. Or you could buy Halo 3 Odst which comes with a disc that is specific for online, custom games, and forge with ALL the Maps.
You have to have Xbox Live and then go to the marketplace and download them some cost points some dont!