Some creators have made concept art or videos showing what a PSP version might have looked like.
Unlike the HD Werehog (which had long, sprawling combat levels), the PSP Werehog is: Sonic Unleashed Psp Rom
No official version of Sonic Unleashed was ever released for the Sony PlayStation Portable. During its initial launch, SEGA focused on three distinct versions of the game: Developed for Xbox 360 and PlayStation 3. Sonic Unleashed PSP ROM: A Comprehensive Overview Fan
The ROM hacking community has improved the PSP version dramatically: Legality : Downloading ROMs may infringe on copyright
Memory overflow during video playback. Fix: Delete or rename the movie folder inside the ISO using UMDGen. This skips all FMVs but keeps gameplay intact.