The Elder Scrolls Travels: Oblivion (found build of unreleased PlayStation Portable spinoff to open world role-playing game; 2006) - The Lost Media Wiki
Footage Of Canceled Elder Scrolls PSP Game Emerges - Gameranx
Rumor: Oblivion is, in fact, coming to PSP | Engadget
If anyone wants to play the unrealeased PSP version of the game : r/oblivion