The new levels appear to focused on Desmond and include first person puzzles. The achievement list can be found over on X360A.
Also various online retailers have put up listings for Assassin’s Creed: Revelations – Ottoman Edition. The majority of listings have since been pulled. South African retailer AWX still has the Edition listed for release on March 16 and mentions that it will include “free downloadable content.”
EGM’s TAKE: Fans have been calling out for some more single-player content for some time and it appears that they are finally going to get it, however it doesn’t appear to advance the story in any way. As for the Ottoman Edition, it’s no surprise. It looks like it’s just a Game of the Year Edition, similar to the Da Vinci Edition of Brotherhood that released last year, but if you’re yet to pick up the game then you should hold back until this releases.