Many visitors always ask how they can play old Nintendo or Sega games on their PSP? Well, if you can find the game ROMs, you can play them, thanks to the PlayStation Portable homebrew community. We've picked some of the best or most popular emulators for each of ten systems that can be emulated on the PSP. (Please note that these are links to exteral sites and are not official Sony products -- using them may void your warranty.)
1. NES: Nintendo Entertainment System
NesterJ is the most-used, and most-likes NES emulator for PSP. It runs well, with most games playing at their full intended speed. This homebrew is frequently updated, and there are few reported problems from users. It seems to have to most features of all the available NES emulators.
2. SNES: Super Nintendo
SNES9x is a SNES emulator developed for the PC; the Unofficial SNES9x for PSP is an unofficial port of the emulator for PSP. Of the available SNES emulators, this one has the least amount of frameskip when running games at full speed. It is the most frequently updated and has the most available options.
3. N64: Nintendo 64
It's not actually finished yet, but it looks like Monkey 64 is going to be a great emulator. Considering that most of the homebrew community didn't think there'd ever be a working N64 emulator for PSP, the progress on this one has been impressive.
4. Gameboy & Gameboy Color
Rin is an emulator for both Gameboy and Gameboy color (which makes sense, as the GBC could also play older Gameboy games). It seems to handle just about every GB and GBC game without problems, and it's got some nice features.
5. Gameboy Advance
PSPGBA is a nice-looking Gameboy Advance emulator. It has multiple languages to choose from, and can be adjusted to boost the speed for some games that may run slow.
6. Sega Genesis
PSP Genesis is a fast Sega Genesis emulator, able to run most games at full speed. It also has lots of features and can play most Sega Genesis games without problems.
7. Atari 2600
StellaPSP is a port of the Stella Atari 2600 emulator. A big advantage of Atari emulation is that there are quite a few game ROMs that can be downloaded legally for free. While the latest version of Stella isn't perfect yet, it does work, and a new version is on the way.
8. Commodore 64
C64PSP is a PSP port of the Frodo C64 emulator. It's stable and runs games at full speed without problems. It's got some great features and the latest version even seems to have some compatibility with firmware version 2.0.
9. NeoGeo Pocket
It's not perfect, but NGPSP does run some NeoGeo Pocket games without too many problems. It's the only PSP NeoGeo Pocket emulator out there, so if you want to play NGP games on your PlayStation Portable, this is what you need.
10. NeoGeo CD
This emulator has lots of options and, while it still has bugs, there are frequent updates as the homebrewer works out the problems, and many games are quite playable.