The M.A.M.E. (Multiple Arcade Machine Emulator) written by Nicola Salmoria and MAME team enables us to play thousands of classic arcade games on our computer. In this way, we can relive the joy and happy memories brought by the classic video games on arcade game console in the past.

In the past, to play a game for some platform on a computer, you have to find a corresponding console emulator to run it, and the necessary settings of each emulator vary. Some are very simple, while others may be more complex. This can be troublesome even for video game lovers who are fond of doing things from side to side. Fortunately, the appearance of RetroArch makes it more convenient for playing the classic video games on various platforms (a wide range of computers and game consoles) - within the same, lick and friendly GUI, as well as unified settings (so all configuration will be done once and for all).

MorphGear was ever a very powerful and celebrated multiple game consoles universal emulator (basically a frontend) that lets you emulate different console systems by using different emulator modules. It is capable of emulating GameBoy Color, GBA, NES, SNES, GameGear, MasterSystem, Genesis and TG-16. Especially, it's pretty easy to configure and has very good graphics & sound effects, as well as ROM compatibility.

To play PSP games on computer, at present there are only three PlayStation Portable console emulators available: the currently best PSP emulator - PPSSPP, the earliest PSP emulator developed based on Java - JPCSP, and PCSP - a discontinued but very good PSP emulator developed by partial members from the development team of PCSX2.

In fact, PGM2 emulator is a special revision edition of MAME just compiled with the PGM2 driver (pgm2.c). Or let me put it another way, PGM2 emulator was developed based on the MAME.