Earlier quoted context omitted.
> What's the use of "installing" an application these days? Once I "install" an application, for example libreoffice: - It works even if I do not have a working Internet connection (or back in the day, even if I had removed the original media from the drive); - It works even if the original is gone. That is, by "installing" an application, I gain a permanent, offline, working copy of it.
Most of this isn't a given anymore with software vendors going subscription-only like Adobe's Creative Cloud. On the other hand, PWAs (Progressive Web Apps) also work in offline mode without a "traditional" installation step.
Stay offline for 30 days (iirc) and try to play the games you paid for.