Premise: Assassin's Creed is an action-adventure stealth video game developed by Ubisoft Montreal and published by Ubisoft. It is the first installment in the "Assassin's Creed" series. The game was released for PlayStation 3 and Xbox 360 in November 2007, and was made available on Microsoft Windows in April 2008.
Hypothesis: Assassin's Creed had many sales in 2008