If you buy the game then there will be a code with it.
Yes, you do.
No
If you only have the demo of the game.
One is for online use that to access multiplayer and the other one is to join the gun club that one isn't as good but you can use it.
The Battlefield 3 Open Multiplayer Beta will be online from the 29th of September to the 10th of October. Those who pre-ordered Battlefield 3 from Origin for Windows before the 25th of September and those who purchased the limited or Tier 1 edition of Medal of Honor will again early access to the beta 48 hours prior to everyone else.
Battlefield Online happened in 2010.
Yes, why would they not.
Once.
No
offline it does. online, no
Battlefield Online was created on 2010-03-25.
All the battlefield series are playable online.