PtoPOnline released a video recently showing off how Elder Scrolls Travels: Oblivion runs on the PlayStation 2, as a version was planed for that console in addition to the main PSP release.
A special PS2 build of the unreleased PSP title, running on PS2 Development Hardware only at this point. No sound plays during this build.
PS2 ports of various PSP games are common, as even Sony made PS2 versions of some releases like Secret Agent Clank and Jak & Daxter: The Lost Frontier. It’s always interesting seeing the history of game development and this version of EST: Oblivion is just another part of gaming history we can learn about.