Beyond: Two Souls was one of the arguable winners of E3 with Watch Dogs and The Last of Us. If you do not know who David Cage is, you probably should. He is one of the few writers that is helping to elevate narratives in gaming. Cage wrote Heavy Rain and Indigo Prophecy, two games notorious for their great writing.
In previous projects, like Heavy Rain, Cage was paired with relatively unknown actors and could still put out some great games and narratives. Now, Cage has the likes of Ellen Page in Beyond: Two Souls. I think this is the first time a mainstream actor/actress has been this involved in a project to this degree. Please correct me if I am wrong.
Below is a video of an interview with both David Cage and Ellen Page. The interview details Page’s involvement in the project and talks/shows a lot of what it actually is like to act in/for a video game. This is a great interview to help you understand a little better how games are made. And this is good for understanding specifically how Beyond: Two Souls was made.