The last two downloadable content packs for Assassin's Creed: Revelations were multiplayer focused, but it appears the next wave of content will be a single-player affair.

It appears AC: Revelations has more story to tell.

As spotted by Xbox360Achievements, the Ubisoft action adventure game features 10 new achievements of unknown providence. One of the achievements tasks players with crossing the River Styx, and another is unlocked after falling 25 meters and landing on a block.

No mention was made as to what the content will be called, when it will be released and on which platforms, or how much it will cost.

Previously released Assassin's Creed: Revelations multiplayer DLC includes the Ancestors Characters Pack and the Mediterranean Traveller's Pack, which shipped in December and January, respectively, for the Xbox 360, PlayStation 3, and PC.

On top of the rumored single-player DLC for Assassin's Creed: Revelations, Ubisoft is reportedly planning an Ottoman Edition of the game. As spotted on United Kingdom retailer Game (via CVG), the new edition of the game will include unnamed "free downloadable content."

As of press time, Ubisoft had not responded to GameSpot's request for comment on the matter. For more on Assassin's Creed: Revelations, check out GameSpot's review.