yes
Both players will be Master Chief.
Yes it is two player on the same console and 4 if over xbox live
Yes.
It will be, yes.
yes you can
The second player will also play as Master Chief in a co-op game.
yes but it is really hard you have to go onto online then choose how many players you want that is how you do it
you can if you play coop campaign mode. The second player will be the arbiter
offline firefight coop surpports online 16 players, system link 16, and 4player split screen.
What the guy before me Obviously meant to say was, No, Halo ODST Offered you the beta. Halo reach came out 5 days ago, and once again you do not need XBL you can play halo reach without it, but on the otherhand, xbox live offers multiplayer coop campaign coop firefight and forge and custom games. So would buy XBL anyway. Gamertag Mr Gingee
Halo 4 is called Halo 4.
Yes, Halo 2 includes a coop mode where 2 players can play the campaign together.