With GOG, you can buy any game, and you’ll have files to keep. Once you have the installer, you can keep that forever.
Even if your GOG account is hacked, banned, and GOG goes out of business, you can forever install your game onto any compatible machine, even offline, and play the game.
That’s what GOG does differently.
It’s like buying a physical game, except there’s no disc. They can’t revoke your access or deactivate your ability to play the game.
I know that. That still misses the point. The point of the law is to clarify that on digital storefronts that you make purchases for licensed digital goods, that you can’t imply to the consumer that they actually own those goods. It doesn’t matter if there is an offline installer. It doesn’t matter if you can ‘keep your installers forever’.
This article seems to say that it covers only digital items that have an always online requirement.
https://www.gamefile.news/p/california-ab2426-crew-call-of-duty
So i think offline games don’t need the warning, but online games, steaming movies, etc do need the warning.
Edit:
I looked a bit further and found the bill text:
https://leginfo.legislature.ca.gov/faces/billTextClient.xhtml?bill_id=202320240AB2426#99INT
(4) This section does not apply to any of the following:
[…]
© Any digital good that is advertised or offered to a person that the seller cannot revoke access to after the transaction, which includes making the digital good available at the time of purchase for permanent offline download to an external storage source to be used without a connection to the internet.
This exception clearly allows for user downloadable installer for a game with offline functionality. But consoles, steam, etc where you don’t get a standalone installer, they look like they will need the warning on all titles.
Technically that also applies to Steam, since you get a digital good available at the moment of purchase for permanent offline download to an external storage, just copy the game folder and you’re done. It would be the equivalent of a music store place downloading mp3s (and the equivalent to GoG would be selling an .iso to the music CD you can burn whenever you want or an installer that extracts the mp3 to a folder).
If the game itself has DRM then that would also apply to GoG (yes, there are games with DRM on GoG, there’s just proportionally less of them).
How does an offline installer from GOG differ from the offline installer provided on a CD/DVD?
The license for the DVD version is with the actual disk, the license for the offline installer is with the GOG account.
GOG has essentially created a way to bypass their own licenses, as a feature. And it looks like they won’t be affected by this law because of it.