Everything in Halo 4 as of now is co-op. Campaign, Spartan - Ops, and Infinity (Multiplayer) Internet, local, and system link.
You and a friend IRL or over XBOX Live work through the Halo : Reach campaign missions
Both players will be Master Chief.
In the BTEA there is 4 player split-screen, but that is all that is announced. But like all other Halo games there will probably be 4 player max on campaign, and 16 player max in custom games and matchmaking.
you cannot, only 2 are allowed
The second player will also play as Master Chief in a co-op game.
you can be master chief arbiter: 2 players elites:2-4 players
Only in Online Campaign, Not Local Play
No, Halo Reach occurs much before Halo 4. In the timeline of the actual world, the games go: Halo Wars Halo: Reach Halo Combat Evolved (And Anniversary) Halo 2 Halo 3 Halo 3 ODST (Same time as Halo 3) Halo 4
I would suggest COD 4 (Call Of Duty 4) or Halo 3 but my favourite is Call Of Duty 4.
Depends on what time of day it is. Halo reach is a pretty old game now so don't a huge amount of players on it.
Yes