UFC Undisputed 2010 PSP: Compact MMA Action for the PlayStation Portable (PSP) brings the intensity of the Octagon to a handheld format, featuring nearly all the content found in its console counterparts. Developed by Yuke's and published by THQ, it remains a standout title for fans of mixed martial arts who want a deep, technical fighting experience on the go. High Compression Details
Released on the PSP in October 2010, is a direct port of the console version, offering a comprehensive MMA experience on a handheld. Developed by Yuke's and published by THQ, it features a massive roster of over 100 fighters and retains nearly all the deep gameplay systems of its PlayStation 3 and Xbox 360 counterparts. Core Gameplay Mechanics
If you have the original UMD, do this: