If I buy a Windows game to play via wine and it doesn't run properly, do I get my money back, or is it considered my fault for having bought a game whose requirements my computer doesn't attend? Of course I'm considering that my machine easily got the hardware requirements.

The second one.

You wouldn't get a refund, correct. Buy only after checking threads here, WINE DB, and the general internets.

And the game is...?

I'd also like to know which game it is.

For some instructions how to makes several games run on Wine you can visit: https://www.gog.com/forum/general/the_judas_does_this_run_in_wine_thread_v1173

You can try the free Porting Kit from this website:
http://paulthetall.com

Or the paid version called Crossover:
https://www.codeweavers.com/products/crossover-mac/

But as already said: For games that are advertised on GOG for Windows only, you got no guarantee that they also run on Wine.

Only thing you can do is to have a look which games you can find in the library in the Porting Kit or Crossover.

Another good internet site wehre you can find Mac wrappers for free is:
www.portingteam.com
But you have to register yourself before being able to download a wrapper.

Some games like Undertale, SimplePlanes, or HuniePop work just fine though Wine.

Some games require some work, like Civ IV. And would probably prefer if you're using the actual driver provided by your video card maker, rather than the open source one.

Others need to be installed on your actual Linux partition or have enough files to fool the game into working because otherwise it simply won't work.

Games with launchers and frontends tend to be tricky.

Some experience bugs with mouse acceleration and such and are best launched from a virtual desktop.

Thankfully, Wine can be made less obtuse though several methods. Now personally, I don't like Play On Linux because that involves having multiple versions of Wine installed as I understand it. But recently I gave Q4Wine (a basic launching frontend a try) and aside from most of the UI being invisible due to a lack of a proper QT theme being installed. My fault.

A lot of older games won't run though wine because they run though DOS instead. Now as unfun and pedantic as it is to load up a program though DOSbox itself, due to the command line nature of it, I find myself using a frontend like Dosbox Game Launcher to be a much nicer experience.

Virtual machine is a nice replacement of wine.
Windows 7~10 have a lot of free and legal versions you can download.
(Microsoft officially provided those specific versions.)

Gog does not officially support running games in Wine, so they're quite unlikely to issue a refund if you bought it to run in an operating system not listed as supported. Only buy a game if your OS is supported or you're ok with it not working and being your problem to solve. The community will likely gladly assist though, and Judas responds in the "will this run in wine Judas?" thread to many queries.

Hope this helps.

Or, if there is a difference between versions and you prefer the way the Windows version behaves.

I note that, in the case of Undertale, speedrunners actually prefer the Linux version, and have even devised a method to get the Linux version to run under Windows.

Failing to run properly? No, not even as the Fedora Madman. But CPU spikes are a minor concern while both loading and installing. There's always a chance I'll run into library issues due to the way Fedora is organized vs Debian (Ubuntu et al). For example, I'd have to patch a few symlinks though in order for OpenRCT2 to run because something like libcrypto.so.1.0.0 isn't provided by anything in the Fedora repositories because libcrypto.so.1.0.0 is a depreciated entity. :y

Fortunately, I'm not talking about a given title, since I haven't suffered by system incompatibility by the moment. I just had too ask because there's still a lack of Linux games in the store and, well, money is money. By the way, I'm gonna take a look at these porting solutions if I come to have trouble. I had a problem with Tyrian 2000 thanks to it's Windows DOSBox port. Now I'm playing the game with the Linux native version, but I only have this one MS-DOS title because it's bothering to change the automount file everytime you want to play or, worse, typing it all the way. I'm sure gonna give a look at this frontend. That's a whole new for me and I admit I'm glad to know that. I'll have this checked out as soon as I get my new computer. Yeah, I've been unable to play the Linux titles in my library because the installation was requiring a software that I couldn't find in the repository. I managed to find it's source code, of course, but it was easier to run the Windows version of such games than compile a new program without knowing if it would solve the problem.

This comes as a good point. Though I've never managed to play a Linux native version of any GOG game, when I took Tyrian to play it in the penguin's DOSBox port, I've lost the Christmas special or something that the original version offered everytime I launched it.

I'm grateful of the replies. Even being the answer a negative, I feel relieved now. Thank you all \o/

Two out of the three major video card manufacturers actually provide the open source driver. NVidia is the black sheep. Do you actually care for tickets from people not running one of the blessed distros?

There's a third?