The entire Treasures of Monkey Island series. Yes, it's a PSN title, say what you want about not being on disc, but as far as titles that are least likely to be owned that I have, I'd safely say that's what it is for me.
If we're talking about disc titles only, then it'll probably have to be Brutal Legend. --- PSN:LonelyDesperado MissTFayed: rahmed51387 - You got the surfer accent. You are officially the smartest person on here.