Halo 3 multiplayer was fun, the guns' damage was prefect, but ever since Halo Reach was released all the Halo gamers have been playing that, if you want to get Halo 3 get Halo 3 ODST so that you get the mythic map pack for Halo3 and every other map, bUT I recommend Halo Reach over it.
yes there is it requires xbox live for online but you can do split-screen
1-4 players
^
that is not true, ever since halo 2 excluding halo 3: ODST there has been the ability to play against your friends of up to 4 people on a local match
Chat with our AI personalities
4 players per Xbox 360. you can system link and have up to 16 players (4 on each xbox or etc) or Refereed is Xbox live. Go to Xbox.com for more information. Xbox live connects every gamer that has xbox live and puts them all in one place! you can chat, send msgs, look for games and download them, download map packs, customize avatars and much more!
Yes, the new Firefight mode will give you this ability, over XBOX Live and just in your home with someone.
Yes, Just Go To Matchmaking And Choose Campaign, Or You Can Do Split-Screen Offline.