After getting such a great response to Assassin\u2019s Creed: Brotherhood Beta, Ubisoft has announced that they have decided to unlock the new Sienna map for Assassin's Creed: Brotherhood for all the participants. Giving out the details of it on the official facebook page of the game Ubisoft said that participant will be able to have an access to Sienna Map once they complete five millions kills.Here is what the official facebook page of the game reads: "Attention Assassin\u2019s Creed Brotherhood Beta participants! We are very excited to see the awesome response from our fans! As a thank you for the incredibly valuable Beta feedback you have submitted, we have decided to unlock the Sienna map once you have reached five million kills! You\u2019re almost there, so we expect to see you crush this objective in the next couple of days!"