Playstation Portable ROMS are game files that can be played on a Playstation Portable device. They can be downloaded for free from a variety of websites on the internet. Some ROMs are also available for purchase, but most can be found for free. Be sure to check the legality of downloading ROMs in your country before proceeding. To play the games, you will need to have a Playstation Portable emulator and the appropriate ROM file. The emulator will allow you to play the game on your computer, while the ROM file contains all of the data necessary to run the game. Enjoy playing your favorite old school games again with Playstation Portable ROMS!