With the crazy sales Gamestop is doing clearing out PSP games I've been picking up a lot of titles for the system, but while I've been looking around I've been unable to find a definitive list of games for the PSP that were released on UMD.
There is a big list on Wikipedia but I have no idea how up to date it is, and it includes titles from all regions, plus I couldn't really tell if it denoted PSN only titles, or titles that were ALSO released on PSN.
So anyway, does anyone know of a good, legitimate, resource to track all the PSP games (and maybe movies) that were released on UMD?
Note: I did search for forum first and couldn't find a thread addressing this, if there's already one please let me know. I'm mainly focusing on RPGs but there are a lot of pretty good games for the system.