The Game is Successful
As stated by Ubisoft, the Assassin’s Creed franchise has exceeded 78 million sales in total since the first release in 2007. Even the most recent Assassin’s Creed Unity sold 1.97 million in the first week of release for Xbox One, Playstation 4 and PC. The game is clearly a success despite the numerous amount of issues that may appear to come with it.
With sales as high as that, there would be no reason for Ubisoft to stop releasing the game yearly as it gains more popularity.