Genecyst Version 0.30; DOS; F=9.0 E=9.0 S=9.5 Sound=8.5;
Amazing! The interface is almost completely the same as NESticle (i.e. wicked!), except for the change in color scheme and the addition of a ton of gory blood dripping off the menu bar. You have most all of the same options available in NESticle, like the input dialog (you can use most keyboard keys and your joystick, gamepad, or GrIP if you have the driver), timing dialog (you can change the "Virtual FPS"), multiple resolutions (640x480 or 640x400 works best, because the low resolutions aren't quite big enough to handle the resolution of the Genesis, and Mode X is slower), instant game saves, that nifty CPU use thing, some kind of cheat patch support, and screen snapshot saves. The emulation is pretty good. I have only a few ROMs, but they all work acceptably under Genecyst. .and It is also quite a bit faster than GenEm, though KGen is catching up... It supports the .SMD and .BIN file formats. Oh and concerning the sound, it is good but guess what... like the SNES, the Genesis also has a second processor for sound! So to get sound on most games you must enable the Z80, which can slow down emulation quite a bit.

KGen Version 0.32b; DOS; F=7.5 E=9.5 S=8.5 Sound=9.0
This emulator (the newest one) is known for having the highest degree of emulation (the most games work on it.) The first version didn't have a graphical user interface, but this one does. (It's the press-escape keyboard-based kind, like in SNES97 DOS or Magic Engine.) The sound is sometimes screwy but its completely digital, so it ought to sound better than Genecyst. I had a problem with the frame-rate control... in VSYNC-off mode it runs super fast (say 400% speed on my computer) and seems to have about 6 frame-skip no matter what you try to set it at. Meanwhile in Vsync-ON mode it is much slower and on my computer runs about right somewhere between 2 and 3 frame skip.

GenEm Version 0.17-DOS, 0.19-Win95 beta. F=7.0 E=9.0 S=7.0 Sound=2.0
GenEm can only save the save RAM in RPGs, making it difficult for playing anything else (can you really keep your computer on for five hours straight playing a game through without accidentally pressing the ESC key? If so I am in awe.) The sound sucks and there aren't many convenience features, but the emulation is great for most games. But this one was discontinued a while ago, and I think KGen has higher compatibility now...

The Game Boy.

Virtual Game Boy Version 0.86; DOS (also there are Windows and Linux versions); F=8.0 E=9.5 S=8.5 Sound=8.5
Marat ordered the project discontinued, but luckily no one listens to him anymore, so now we have a "20-30%" faster VGB. Virtual Game Boy runs most games perfectly, except for the sound, which is a little flaky. It supports joysticks/gamepads, color customization, key remapping, Game Genie codes, and full screen playing on most monitors. It can synchronize its speed with that of a real Game Boy, but on a slow computer you may want to specify a low uperiod to slow it down a bit so that the animation isn't chunky. All of these options are specified on the command line or in a .CFG text file. There is no instant save feature, so the emulator is best for playing games with save RAM like Zelda, Final Fantasy Legend II, and so on.

GB '97 Version 2.368?; DOS; F=7.0 E=9.5 S=8.0 Sound=9.0
Not a bad emulator; emulation is similar to VGB. I haven't worked with it for a long time, but as far as I can see, it doesn't make/load .SAV files or have an instant save feature. A new version has recently been released, but I haven't checked up on it. I heard it is now faster than VGB.

NO$GMB Version ???; DOS; F=9.0 E=?? S=?? Sound=??
Nov 1/97: Well I haven't used game boy emu's in a long time, so I'm not gonna do a complete review here. This emulator supposedly has a lot of features, but good luck figuring them out. After five minutes fooling with the strange user interface of this emu (which seems to be a full-featured debugger with game playing as an afterthought), I loaded a ROM (Super Mario 2), fooled around with the options and user interface for a few more minutes, and managed to play the first level... when I got to one of the sub-worlds, though, the emulated game screen turned to gibberish.... Anyway, supposedly this emu has very good emulation, and two-player game-link support and stuff, once you figure out how the heck to use it... so check out its homepage.

Hyperboy Version 0.374; Windows; F=5.0 E=8.0 S=6.0; No sound.
Well, if you wanted a windows emulator, now you know there is one. It hasn't been updated recently. I don't know it's address...

Turbo Graphix 16

Magic Engine Version 0.9; DOS; Shareware; F=6.0 E=9.0 S=8.0 Sound=???
A nice little emulator that seems to work right on most games. Don't trust my ratings because I haven't compared it to other TG16 emulators and don't have a lot of ROM images. Also, I couldn't get the sound to work (neither on 0.8r or 0.9.) This is one of those emulators with hardly any options to play with and hardly any documentation - in my opinion it's TOO easy to use. I mean I don't know how it autodetects the sound card but there's no way to manually tell it your settings to make it work. =(

VPCE Version 0.2; DOS; Freeware; Untested
There is also a Win95 version here.