you cant >:(
If you install it onto your harddrive and insert the original halo 3 disk you can access the three extra maps and the matchmaking features.
haw to make mode maps in halo 3
By getting halo 3 odst ( two discs ) first disc halo 3 odst campaign and 2nd disc halo 3 mythic comes with all the halo 3 maps.
Yes
You can't. The Mythic Maps our only playable on Halo 3, not Halo Wars.
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.
No, you cannot put Halo 3 maps directly onto an Xbox 360 Memory Unit. Halo 3's custom maps are saved to the game itself rather than being stored as separate files that can be transferred. However, you can share maps with friends by using the game's built-in sharing features, but they must have access to your Xbox Live account or game profile to download them.
yes and no. You can play all the maps in the halo 3, but you have to download the rest.
play sonic in halo just download and the maps change
i do belive there will be a forge to make maps like Halo 3 did.
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.