If by forge you mean customizing the armor in multiplayer, then you just go to the menu in multiplayer and choose the one that lets you choose what to wear.
odst dos not include forge
Yes, Master chief is still in space with cortana in halo 3 odst he counts as a spartan and in multiplayer forge or any you and or friends are Spartans and when i played campaign i found a dead spartan on a building roof with a brute.
So far no, not without a mod or hack but you can make objects that can be used by Spartans lol XD
You don't. Money in Halo 3 Forge is set to the map limit.
No, halo 3 forge is not offline, you may play it online with friends or others.
No. In Halo 3, you can only play as Spartans and Elites.
no
No
go to the main menu and select forge
Search Forge in google there is a forge program for your computer!
yes there is
Yes, there will be Forge mode in Halo 3: ODST... but on the other hand there is two discs so there might not be in the halo ODST disc.:)