Play locally.
No! Forge World on Halo: Reach is completely free, provided you have the game and Xbox to play it on!
you need xbox live
No, you don't.
No, you can forge while not connected to xbox live. If you want to share your maps, and view other people's maps you will need xbox live though
No. Its 100% free, and if you have Xbox live, you can customize maps with your friends.
Yes, you can play firefight in Halo 3 ODST without Xbox live.
no u just have to use forge which is included in all halos except halo 1 and halo2 u can find it on forge it can be edited but that is modding an u can be bootted from live for it
no, you must connect to xbox live to download halo 3 map packs.
No, You need to be a member on XBOX LIVE to rank up.
No you need xbox live for certain achievements!
You can download a mod for halo2 on xbox somewhere on www.keygens.nl. Then you have to get a net work cable and connect you computer to the xbox(there is a network port on the back of the xbox and on the back of the PC) and then you just drag and drop the mod on the xbox's hard drive and halo should recognise it and let you play forge.
Yes. you can play with up to 16 people in forge over Xbox Live. You can also make it so only the party leader can go into edit mode so everybody can play a map but not edit it.