An open world action-adventure game with some very nice looking graphics? How did we not see this before? Joystiq even wrote a preview, and yet somehow we missed it. Anywho, a new developer diary for DarkSiders has been released and the game is looking pretty nice. As stated above, it's an action adventure game with open areas, slick looking combat, puzzle solving and, of course, character upgrades. In short, it looks hot. The beginning of the video notes that the footage is taken from an E3 demo, so hopefully we'll be getting our hands on it when the show starts later this month.