Marvelous Interactive has updated the official site of their PSP RPG Valhalla Knights with new screenshots and a new official trailer, which you can watch below. Valhalla Knights is currently only set for a release in Japan in August and we have no information about the story or gameplay. Given how good the game looks, a publisher could eventually pick it up for the North American and European market. The PSP is in need of decent RPGs and Valhalla Knights might just be the right addition.