A total of 10 studios are working on Assassin's Creed Unity, Ubisoft announced today in a slide (pg. 19 in this document) from its earnings report for the fiscal year ended March 31. By comparison, last year's Assassin's Creed IV: Black Flag was developed by a total of seven different studios.

Studios working on Assassin's Creed Unity include Ubisoft teams in Montreal, Toronto, Singapore, Quebec, Annecy, Shanghai, Chengdu, Kiev, Montpellier,and Bucharest. Ubisoft has a total of 29 studios worldwide, meaning Assassin's Creed Unity is being worked on by around a third of Ubisoft's studios.

The slide specifically references Assassin's Creed Unity for Xbox One, PlayStation 4, and PC. There is no mention of the rumored Xbox 360 and PlayStation 3 game, Assassin's Creed Comet, so it's possible there are even more than 10 studios working on new Assassin's Creed games for 2014.

Ubisoft employs 9,200 people worldwide, including 7,800 dedicated specifically to game development. It's unclear how many people in total are working on Assassin's Creed Unity. For competitive reasons, it's unlikely Ubisoft would share this information. We asked Ubisoft to say what percentage of Ubisoft's entire workforce is working on Assassin's Creed Unity, but were told, "We do not comment on this number."

Assassin's Creed Unity launches this holiday for Xbox One, PS4, and PC. It is set in the French Revolution, but that's all we know about it so far.