Offline, you need to connect 2 systems with a cable because only two people can play at one time on one system. However online, you can play 4 player co-op with each person on their own console over the internet.
No, it only has 2 player split-screen but it has four player co-op online. You also can't play online co-op with a local friend.
No.
Yes you can. You need xbox live and a harddrive. you can play campaign with i believe up to four people.
It's not necessary, no.
Up to two players can play Borderlands 2 on the same system.
The Game Borderlands does not need a serial. Instead, the game registers itself online before you are allowed to play.
No, in Borderlands you can join any public online game or even an online game with a friend and use an already existing single player character. Then you can play single player again with that same character. When playing online all stat upgrades, guns, exp, etc. are saved and you can still play on single player with everything you've earned online
No, you cannot specify levels. Host has the power to kick whichever player(s) is(are) not wanted to play with
Yes you can play as the same person from the start just click so you can have 2 Rolands or two Lilith or 2 anyone
Yes (windows 7 user)
Campaign should be one of three options to choose from when you first play Halo Reach. It will show up along with Matchmaking and Theater on the main menu.
Only Four
For you to be able to play the game itself - no.
Try playing split screen with four controllers.