Without a doubt, MAME is one of the best, most famous and most vibrant multi-system arcade emulators in the emulator history. However, its usability has never been high enough, and its direct support for games is very low - you'll find that MAME can detect and recognize so many games but is not able to play them all, often simply reports that a bunch of files are missing. As a result, many variations of MAME have appeared, and one of AppNee's favorites is MAME32 Plus!.

BizHawk is a free and open-source multi-system universal emulator written in C#. Its goal is to eventually simulate all game consoles, and already supports FC, MD, GBA, SFC, SMS, NES, SNES, N64, PC Engine, SS, PS, PSP, and so on more than 10 game consoles. It comes with the professional TAS functions while taking the ease of use into account. That said, BizHawk not only can be used for game clearance video production with TAS, but also is friendly for casual gaming.

XEBRA is a little-known but excellent free PlayStation emulator for Windows and Android platforms, developed by Dr.Hell from Japan. It strictly focuses on the accuracy of PlayStation emulation, does not use any plugins, and only outputs in native video resolution. At the same time, it is also one of the very few PSX emulators that is compatible with PocketStation.

It's no secret that Microsoft's Xbox 360 platform owns a lot of exclusive games. If you don't have an expensive Xbox 360 game console and want to play the Xbox 360 exclusive games for free on your PC, you can try out this Xbox 360 emulator xenia. This is the only working solution to emulate the Xbox 360 console on a computer right now.

yuzu is a free and open-source Nintendo Switch emulator for Windows and Linux platforms, developed by the creators of Citra (the Nintendo 3DS emulator) in 2018 (that had only been 10 months since Switch was released). It is the best Switch emulator out there, based on the Citra (they share a lot of code), written in C++, has portability, and its features are still being improved.