Just because Ubisoft announced a new Assassin's Creed is coming out on October 30 doesn't mean it's completely forgotten last year's installment, Revelations. Ten new achievements for an unknown Revelations DLC pack were spotted by Xbox 360 Achievements, appearing to be for the single-player campaign. They include crossing the River Styx without dying, landing on a block after falling 25 meters, and "Breaking the Loop," one of two secret achievements.
Ubisoft may be gearing up to release a new version of Revelations, as UK retailer Game briefly listed the Ottoman Edition (with "free downloadable content") and online market AWX is advertising the same version with a release date of March 16, CVG notes.
The previous two DLC packs for Revelations, Mediterannean Traveler and Ancestors Character Pack, have been multiplayer-centric. Perhaps the new DLC will bridge the gap between Desmond's Revelations arc and the new story -- not that he would need a bridge, but still.