yes and no. You can play all the maps in the Halo 3, but you have to download the rest.
no, you have to download the rest
If by "halo 3 maps" you mean the Halo 3 Heroic, Legendary, Mythic and Cold Storage maps, then yes. However to play campaign levels, you must actually advance in the game to get to them.
If you are referring to the Firefight maps they open as you campaign.
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.
no
Kinda, you get Halo Reach, but you are limited to playing the Anniversary Map Pack. All game modes are on except Campaign and you only play Maps from the Add On.
Yes, it's a remake of Halo: CE with the remade maps, with online multiplayer, and the remastered campaign.
You have to have Xbox live, and you download the maps.
forge probably not but it will come with 3 new maps for halo 3 and you play fire fight and the campaign in a bigger version of nomindbasa from halo 2
well, at halo maps.org you can get halo custom edition for free. it's the same thing, but without campaign mode. if that bothers you, then download a campaign pack for hce. i have the cmt halo 3 campaign, although there are heaps. plus, you can get custom maps for it.
You can't, you need Xbox Live
Yes, halo 3 mythic is the exact same thing as halo 3 just doesn't have the campaign, also Halo 3 mythic has the new mythic maps included. Online will not change during any gameplay.