I think that given the nature of GOG's clientele, his style of puzzles may possibly be more popular here than yours. That's not a criticism in any way, just an observation.

*sigh*...guess I'll have to find ANOTHER website...

Just substitute the fake names in your thesis with video game character names and add some number puzzle.

Are you using Time Machine? That's the first place I'd look.

What, something so simple? That's just uncharacteristic of me.

No, i don't use time machine.

Don't know about those games, but some games may save their save game files directly in the game's own folders and if the game gets deleted there is a possibility the savegames may be deleted also. Also, when a game is uninstalled and the "do you want to delete savegames?" dialogue comes up if one doesn't pay close attention it sometimes defaults to the destructive option (which is stupid and harmful). I lost all my progress in Far Cry twice from that.

Another problem was GOG Galaxy blowing away games in older releases of the client but I think they've resolved those kind of issues since.

Are you using an SSD drive? One thing that is common with SSD drives but is not widely known to most consumers is that SSD drives are known to suffer random data corruption on power failure or sudden power outage. There have been studies done on various makes/models of drives over time and some of them are much more susceptible to this than others. That can cause random files to become corrupted, and the only really reliable solution to it is using a UPS.

The only other thing I can think of is if have either your installed games or your savegame files stored on some kind of external USB device such as an external hard disk or flash drive. Many people unplug these devices freely without first clicking on "Eject" or "Safely remove hardware" beforehand to notify the OS of the desire to detach the device so it can flush the write buffers to disk and safely disconnect it from the virtual filesystem subsystem. One should always click "eject/safely remove" before disconnecting any USB storage device so that the OS can safely flush the buffers to disk and ensure filesystem integrity. Having said that, I'll also note that many people who do not do this commonly claim "I always just yank my USB devices and I have never had a problem", however what they do not know is that they may have experienced corrupted files in the past and simply never discovered them yet because they may have never accessed those files. I tell people that if they yank a USB device without safely ejecting it via software first that they might be ok if the OS has actually flushed the disk buffers to disk already, which is often the case if the device hasn't been actively used for a while, but that the more recently such a device is used, the more likely corruption will occur if it is yanked and that the only way to be 100% certain it is safe to remove it is to click on the "eject/safely remove" button to inform the OS of the desire to remove the device.

Other than that, the only other things I can think of are other random disk corruption such as a drive starting to fail (use SMART software to test for this), or "other people" mucking with a computer possibly causing problems unknown... :)

Just some food for thought anyhow.

That was one intimidating wall of text o.o
Anyways, on to the serious talk, i think you're onto something with the older versions of GOG, when i saw Galaxy was on beta i downloaded it immediately (perhaps not the best decision..) if thats the case do you know if the files can be recovered and how i might go about this? If not then that's ok, since it's only the one game that i actually care about, i've somewhat come to terms with the prospect of having to just regain my progress through playing the game. Or, reading rather.

 
Hatoful Boyfriend and HuniePop are two games made with Unity, and an issue with MacOS X could explain why you've lost your save files after an upgrade to El Capitan.

In Unity, Application.PersistentDataPath is a string that contains the path to a persistent data directory, used by many games to store their save files.  A year ago, an issue was discovered with MacOS X, where Application.PersistentDataPath was incorrectly pointing to  /Users/<UserName>/Library/Caches/<CompanyName>/<ApplicationName>/  instead of  /Users/<UserName>/Library/Application Support/<ApplicationName>/ .
 
 
Here's the official page about the issue :

  ▪  <span class="bold">Issue ID # 589686:  Application.persistentDataPath is not correct for OSX</span>   (fixed in Unity 4.4.5)
 
 
 
Two different scenarios come to my mind
 
 
1)  Your save files are still in the application cache directory, but your games have been updated and recompiled with a patched version of Unity.  Both games are now looking in  /Users/<UserName>/Library/Application Support/<ApplicationName>/  to retrieve their save files, but the save files are incorrectly stored in  /Users/<UserName>/Library/Caches/<CompanyName>/<ApplicationName>/ .  In this case, moving the files from the application cache directory to the application support directory should fix your problem.

Hinterland Studio, the developer of The Long Dark (also a Unity game), has recently reported an issue with El Capitan :

  ▪  <span class="bold">Warning for Mac Players: "El Capitan" May Be Deleting Saves</span>
 
 
 
2)  Your upgrade to El Capitan has completely wiped the application cache directory, including the save files for Hatoful Boyfriend and HuniePop.  In this case, the only way to recover these files is to use a data recovery software like the one I've previously suggested.

Here are two different articles that show how to recover the missing files.  Keep in mind that the applications they're using are commercial ones, but trial versions also exist.  <span class="bold">EaseUS Data Recovery Wizard for Mac</span> is totally free and is working the same way.

  ▪  <span class="bold">What to do if You Lost Data When or After Mac OS X 10.11 Upgrade</span>
  ▪  <span class="bold">Can&rsquo;t Delete Files? Wanna Recover &amp; Restore Deleted Files? All &ldquo;Delete&rdquo; Related Problems in El Capitan</span>
 
 
 
The following article might also interest you :

  ▪  <span class="bold">10 Common OS X El Capitan Problems &amp; How to Fix Them</span>
 
 

Non-wall-of-text answer: No, not really.

Synopsis of potential wall of text answer: Yes it may be possible <wall of text removed to fit Twitter-style answer>.

Hey, i said it was intimidating, i didn't say i couldn't read it XD