
If you've had any interest whatsoever in PCE emulation, or read any of the discussion here on the topic, you'll know that there's a semi-reliable payware solution in MagicEngine and Yame which has issues for some people, particularly a lack of CD Audio as I know Mr Seed suffered recently. However, a new multi-platform emulator, Mednafen, does the job perfectly and runs on Windows, OS X, Linux and other *nix OS's. It may scare some of you off as it's commandline based as opposed to the attractive GUI of Magicengine, but it's still quite easy to configure and has a lot of the modern conveniences found in emulators these days such as HQ3X filters and so forth.
So:
Windows
Grab Mednafen and find SYSCARD3.PCE, the PCE bios which i'm not going to link to here for obvious reasons, but some creative googling should sort it out for you. When you have Mednafen and SYSCARD3.PCE unzipped to say, C:\mednafen, go to Start - Run and type cmd. From here type "cd mednafen" (assuming it's in a folder named mednafen obviously). Firstly, you'll need to configure Mednafen to know where the PCE Bios is, do this with the following command:
mednafen -pce.cdbios syscard3.pce
Then, assuming you're running the game from CD:
mednafen -loadcd pce D:
Of course, substitute D: for the letter of the CD/DVD drive on your system. If you've made your own .bin/.cue copy with CDRwin or cdrtools in Linux for example (Which i'd recommend if possible as my DVDRW is very noisy when it spins up, plus there's the luxury of not getting the CD out all the time and getting it scratched and so forth) try this:
mednafen -loadcd pce C:\path\to\snatcher.cue
To configure controls, press F3. It'll bring up a prompt with "Gamepad 1: I (1)" Press whichever button you want to be mapped to that button on the PCE controller, then press it again to confirm. To make everything prettier on faster machines, you can try adding -pce.special hq3x to the command line. For fullscreen mode, add -fs to the command line. Example:
mednafen -pce.special hq3x -fs -loadcd pce D:
Settings like pce.special and -fs are saved so you don't need to do it every time.
Linux
Mednafen's website lists a few dependancy packages you need, i'm sure you linux folks know what to do from there. Then you just ./configure and make as usual when compiling stuff.
Mac OSX
Ah, Snatcher on OSX at last is sweet, even if it is Japanese. Ironically, getting Mednafen set up on OSX is probably the toughest of the three OS's and may be something to avoid unless you have some unixy experience, though i'm kinda aware that there's not gonna be millions of people who want JP Snatcher on OSX I'll post how anyway

Grab X11 and XCode from your Tiger/Panther CD or Apple's website, and Darwin Ports if you don't have these already. Then it's a case of using darwinports to install all of the dependancies listed and installing exactly the same way as from Linux, i.e. compiling the source code. If you do ./configure --help it lists some flag like --with_apple_opengl or something, use that to avoid issues.
So, screenshots?

Only one, and from OSX as i'm not at my computer right now. Apologies if this is a bit hard to follow, it's late here and I suck at documenting stuff plus this isn't the most user friendly emulator.