Hollywood high flyers Adam Cooper and Bill Collageare brought on by New Regency.
Around 2 million units below Assassin's Creed 3 in the same time frame.
Alleged ex-dev talks 'troubled' development of 2012 Assassin's Creed.
The PS3 exclusive becomes the first title of 2013 to hold the No.1 spot for four consecutive weeks.
"We want to be prudent on our expectations," says Ubisoft boss as Assassin's Creed 3 ships 12.5 million.
Available today for Xbox 360, tomorrow on PC and PS3, says Ubisoft.
Digital copy of ZombiU now £29.99 as Ubisoft temporarily slashes digi prices.
Mistakes the screen shot for a picture of the Damascus skyline.
Unannounced Assassin's Creed game in the works at Ubisoft Montreal, Annecy and Bucharest, LinkedIn profiles reveal.