Have you ever had a game that that was finished the developers abandoned or no longer support? or perhaps an online only video game that closed it's server on you. And you no longer have access to play it?
be it any kind of video game. Including a mobile or a PC game hat is no longer downloadable. Or that is no longer compatible with a more modern OS.
For me it's the Sims 2 for PC since, a windows update caused a graphics glitch inside create a character mode. Technically it still might be playable, but if you google The Sims 2 it says that The Sims 2 was never suppose to be compatible on windows 10 to begin with. and EA abandoned support for this game and many others years ago,