The "best" character depends on your style of play and your goal, for example: Best meaning the best PvP killer, the best stealth assassin, the best tank? They are well balanced and extremely customisable, so try playing with each to develop your strategy and determine for yourself.
No, Kreig is an add-on character for Borderlands 2.
You can not change your character in mid game, if you want to play a different character you need to start a new playthrough, the game you abandon will be saved so you can return to play it if you choose too.
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.
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
Borderlands 2. Rust is alpha and does not get anywhere right now
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
Its the best add on ever you should totally play it if you haven't already,also its really funny.
This is more of an opinion but I would choose COD WaW. I would choose this because it has zombies and really fun online play. Borderlands however is very fun but really cheesy graphics.
The first player has to load a character. If the first player does not have a saved character they can't load then second player can't load theirs. It does matter how far they are. You can fix this by start a game save it.
M for Mature