On March 19, 2014, images leaked for the next game, titled or code-named Unity, showing a new assassin in Paris. The screenshots show new "parkour up" and "parkour down" buttons, a new navigation mechanic as noted by Kotaku. Kotaku also stated that Unity would release in late 2014 on PlayStation 4 and Xbox One, and would be set during the French Revolution and feature an assassin named Arno.
On March 21, Ubisoft confirmed the game's existence, having been in development for more than three years, by releasing pre-alpha game footage. They also confirmed the game's release date of Q4 2014, and that it would release on the PlayStation 4, Xbox One, and Windows. Ubisoft Montreal is the lead developer for the project, with contributing work from the Ubisoft studios in Toronto, Kiev, Singapore, Shanghai, Annecy, Montpellier, Bucharest, Quebec, and Chengdu.
Assassin's Creed: Unity is an upcoming 2014 sandbox action adventure game, and a sequel to 2013's Assassin's Creed IV: Black Flag. Unity will be set during the French Revolution, and will be exclusive to PlayStation 4, Xbox One, and PC on 28 October.
Following the success of Wolfpack in Assassin's Creed III and Assassin's Creed IV: Black Flag, Assassin's Creed: Unity is the first game in the series to introduce campaign co-op. Up to four players can take on story-based missions including sabotaging an execution, protecting an emperor or assassinating a target.
Sumber: http://assassinscreed.wikia.com/wiki/Assassin's_Creed:_Unity