The "top" archive of PSP ISOs generally refers to the most critically acclaimed and best-selling titles that form the core of the handheld's library. To play these digital backups (ISOs), you must place the files in the ISO folder located in the root directory (the "top-most" level) of your PSP's memory card. Essential PSP ISO Titles
With that out of the way, let’s look at the top tier of the PSP library—the games that demand a permanent spot on your memory stick.
Finding reliable sources is crucial for a safe and complete collection. Enthusiasts generally recommend a few key platforms:
Legally, downloading ISOs for games you do not own constitutes copyright infringement. However, many preservationist sites operate in a grey area, aiming to keep games from being lost to time. If you are looking to legally archive your own collection, you can rip ISOs directly from your own UMDs using custom firmware on a PSP.