SouthPeak Games announced today that Monster Madness: Grave Danger, the latest installment of the Monster Madness series previously known as Monster Madness: Ex, has shipped to retail stores in North America, priced $39.99. Taking on the role of four intrepid teenagers, players will set out to save their town from the evil that's been unleashed. Developed by Psyonix Studios, Monster Madness: Grave Danger promises to deliver tightened controls, a host of mini-games, a polished camera and newly built in extras. A demo is now available on the PlayStation Network.