The launch of this title will be worldwide, so much American players such as Europe, can enjoy it from day 15. The versions available are only those for the PlayStation 3 and Xbox 360 and the PC version has been postponed to December.
In Revelations, history will again in the shoes of Ezio Auditore, this will have to find five keys to enter the library and thus Altair, answer all your questions.
I recently mentioned that Assassin's Creed Revelations, would have some elements of RTS games or "tower defense", this system is called Den Defence, also, some media have reported that this issue will also feature elements fps.
Assassin's Creed Revelations ends the story of Altair and Ezio, Desmond's will end in December 2012 .