you must have xbox live to do 4 player as only two people can be on the same xbox!!!!
Be player 2 in the halo 3 co-op campaign. Or, play the Arbiter levels in halo 2.
Yes, there is a multi-player (odst) campaign and a new HALO 3 disc with a muti-player campaign
Yes, there is co-op in Halo Reach.
There should be a co-op in Halo reach because there was in Halo 3 and ODST why would they stop co-op there?
If you want to be an alien you have to be player 2 or up.
Another Spartan
yes. 2 player split screan or 4 player LAN
if you mean the intro tutorial of how to play just start on co-op and it skips it completely
You can play 4 player co-op on Halo 3, but not all on the same Xbox. To play 4 player co-op on Halo 3 you can either have 4 people all on different xbox's and use xbox live, or have 2 people on each Xbox and either use Xbox live, or System link to join the parties together.
The second player will also play as Master Chief in a co-op game.
yes it is trust me I have it. but you have to have to have xboxlive or sistem link
Everything in Halo 4 as of now is co-op. Campaign, Spartan - Ops, and Infinity (Multiplayer) Internet, local, and system link.