The releases expand on the franchise's overwhelming success, allowing Windows PC gamers to personalize their racing experience with an all-new track editor. Both titles, anticipated to release in early 2006, will allow gamers to race with a collection of new vehicles and chose between new tracks, challenges and mini-games.

"Rainbow Studios is taking their mastery of the off-road genre to new heights, redefining the genre they built for Windows PC and bringing the duel between four wheels and two to the PSP system for the first time," said Dave Miller, Senior Global Brand Manager, THQ. "Gamers can now build their personalized vision of the ultimate off-road environment on their Windows PC, take it online and race against all challengers."

"We're looking forward to bringing the Unleashed experience to the handheld market as well as returning to our off-road development roots on the PC," said Scott Novis, President, Rainbow Studios. "Both titles will possess the unmatched game-play elements that define a Rainbow Studios title and provide exciting new content at the same time."

MX vs. ATV Unleashed: On the Edge and MX vs. ATV Unleashed for Windows PC bring Rainbow Studio's critically acclaimed franchise to the PSP system and Windows PC for the first time, allowing gamers to explore immense free-world areas, compete with an array of vehicle types and vie for off-road supremacy in a multitude of racing modes. The franchise's ultra-realistic Rhythm Racing(TM) physics engine returns, accompanied by an all-new track editor for the Windows PC, allowing gamers to create their own, personalized off-road fantasy. PSP system multiplayer will allow four players to challenge each other online via wireless connection and eight players will be able to get dirty online on Windows PC.