RetroArch is a frontend for emulators, game engines, and media players with all your configurations in one place.

RetroArch enables you to run classic games on a wide range of computers and consoles through its graphical interface. Settings are also unified, so configuration is done once and for all. RetroArch has advanced features like shaders, netplay, rewinding, and more.

A lot is going on here so the interface will take some getting used to. It does remind us the PlayStation look and feel so it might seem familiar. Expect to download a lot of different files, and it can get huge. We'd recommend downloading the portable version so it can easily be backed up and not lose all the time you spend downloading.

So, what engines does it support? We were afraid you'd ask, but you did, so:

2048
3D Engine
3DO (4DO)
Arcade (MAME 2003)
Atari 2600 (Stella)
Atari 7800 (ProSystem)
Atari Jaguar (Virtual Jaguar)
Atari Lynx (Beetle Handy)
Atari Lynx (Handy)
A tari ST/STE/TT/Falcon (Hatari)
Dinothawr
FFmpeg
Game Boy / Game Boy Color (Emux)
Game Boy / Game Boy Color (Gambatte)
Game Boy / Game Boy Color (SameBoy)
Game Boy / Game Boy Color (TGB Dual)
Game Boy Advance (Beetle GBA)
Game Boy Advance (gpSP)
Game Boy Advance (Meteor)
Game Boy Advance (mGBA)
Game Boy Advance (VBA-M)
Game Boy Advance (VBA Next)
Imageviewer
MSX/SVI/ColecoVision/SG-1000 (blueMSX)
Neo Geo Pocket/Color (Beetle NeoPop)
NES / Famicom (bnes)
PC Engine/PCE-CD (Beetle PCE FAST)
PC-FX (Beetle PC-FX)
PlayStation (Beetle PSX)
PlayStation (Beetle PSX HW)
PlayStation Portable (PPSSPP)
Rick Dangerous (XRick)
Sega Dreamcast (Redream)
Sega MS/GG/MD/CD (Genesis Plus GX)
Sega MS/MD/CD/32X (PicoDrive)
Sega Saturn (Beetle Saturn)
Sega Saturn (Yabause)
SNES / Super Famicom (Beetle bsnes)
SNES / Super Famicom (bsnes Accuracy)
SNES / Super Famicom (bsnes Balanced)
SNES / Super Famicom (bsnes C++98 (v085))
SNES / Super Famicom (bsnes Performance)
SNES / Super Famicom (bsnes-mercury Accuracy)
SNES / Super Famicom (bsnes-mercury Balanced)
SNES / Super Famicom (bsnes-mercury Performance)
SNES / Super Famicom (higan Accuracy)
SNES / Super Famicom (Snes9x 2002)
SNES / Super Famicom (Snes9x 2005 Plus)
SNES / Super Famicom (Snes9x 2005)
SNES / Super Famicom (Snes9x 2010)
SNES / Super Famicom (Snes9x)
Vectrex (vecx)
Virtual Boy (Beetle VB)
Wonderswan (Color)
ZX81 (EightyOne)

Nope, no TurboGrafix-16.