Any ".iso" file claiming to be Street Fighter X Tekken for the PSP is likely a fan-made mod or a "reskin" of another fighting game. Official Platforms for Street Fighter X Tekken PlayStation Vita Go to product viewer dialog for this item.

For a plug-and-play experience, stick with official PSP fighters. But for the thrill of playing a “lost” port on original hardware? The hunt for a working ISO is part of the fun.