Think about it. All games that we buy on GOG, Steam or wherever are not physical, i.e. you cannot touch it, sell it, eat it. They are just a couple of lines of code pieced together and made to be able to work on your computer. This isn't, say, bread, which is physical, i.e. you can touch it, eat it, throw it to your pet animal etc. In a way, they are all something abstract. Same for disc-ed games. Yes, they are physical, but the contents need to be installed, so they do not "exist" per se, i mean they do exist, but only as far as your computer allows it to. Outside of it, meaning without access to a computer, a disc is basically as valuable as a broken coke bottle.

If some apocalypse happened tomorrow, and nearly all humanity was wiped out, the descendants of those who did survive wiuld probably not be able to decipher our discs, because they would not have Windows, Linux, Mac or whatever.

Same for the aliens. Even if they were the most developed civilization in the galazy, they would probably still not be able to run our video games without access to our OS, perhaps even their hardware would not comply with our digital data.

So in a way, aren't all games DRM-ed? Since they don't exist outside of Windows/Mac/Linux/whatever operation system?