"Halo 3" is a science-fiction fantasy first-person shooter released on the Xbox 360 in 2007. In this game, you can use the Forge to tweak pre-made maps, adding your own personal touch and challenge to the map for home multiplayer use. The only way you can add more tools to the Forge is by downloading the map packs on the Game Marketplace.
Instructions
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1
Select "Explore Game Content" under the "Game Marketplace" menu.
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2
Select "Browse" under "All Add-Ons."
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3
Select "H," followed by "Halo 3."
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4
Select the map pack you want to download.
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5
Select "Download Now." Once the maps download, they will automatically be added to the Forge for selection.
