A lot of things have changed since the original X-COM was released in 1994. Strategy games have gotten much grander, with higher production values and streamlined mechanics. Now, XCOM: Enemy Unknown has to tow the line between modern sensibilities and the expectations of series fans. We've already talked about our experience with the game at E3, but I caught up with Firaxis producer Garth DeAngelis to learn more about the differences between the original X-COM and it's upcoming revival. Specifically, I want to know what has changed, what has stayed the same, and what is entirely new.