From what i have found by searching was that it has up to 6 player for xbox live versus and 2 player online campaign
Yes, Halo Wars is a Xbox Live game, therefore you can play online against other players.
you dont ever play as a scarab in Halo 3...you play as a scarab in Halo wars.
Nope unfortunately you have to play splitscreen online, halo wars has waaay to much stuff on screen to handle as it is, double it and something would blow up :)
There is multiplayer in halo 4
2 or more players it has multiplayer option
Halo Wars Is multiplayer Online Yes. You cannot go split screen though.. This would ruin the point of surprise , hence why bungie left it out of the game.
You get the Halo 3 ODST campaign and Halo 3 multiplayer. Nothing else.
you can get all of the skulls on multiplayer. =)
yes only multiplayer has the new map packs but you can get them in the DLC
Halo Wars
yes ,if you pre-ordered the ame and got the halo 3 full multiplayer expireance if u use that disc
yes of course they do