Demon's Souls E3 Preview and Trailer

Once you're finished reading through the new E3 preview of Demon's Souls on Cheat Code Central, you can head over to Gametrailers for a three-minute "Co-Op And Devastation Gameplay" video. From the preview:
The way Demon's Souls actually plays seems pretty similar to that of The Elder Scrolls 4: Oblivion in third-person mode albeit with better control. It features a real-time combat engine that relies far more on the player's own skill and timing than on imaginary dice rolls (as is the case with many RPGs).

Just like Oblivion, it also features a deep character building mode. Throughout the game you'll collect souls which essentially act as your experience points. You can then use those souls to purchase new abilities, upgrade your character, and even your weapons. However, since the same currency is used to upgrade all of these different aspects of your character, you've got to be mindful of how you spend them.

When you begin the game, you'll choose one of thirteen different class archetypes, only ten of which have been revealed so far (Knight, Priest, Thief, Magician, Temple Knight, Soldier, Wanderer, Barbarian, Royal, and Hunter). As the game goes on, though, you can spend your souls to become fluent in another discipline. A Knight-Magician, for instance, would have a mastery of swords and spears, and would also be proficient at using deadly magic spells.