If something is opened or modified without manufacturer consent, there is no question of liability because there is none.
It only became a large issue because it was a social fad for politicians and mass-media to dogpile "evil gaming companies corrupting poor mindless children", and Rockstar in particular with the GTA series was one of the most popular targets of said social fad.
https://www.cnbc.com/2023/02/16/tesla-recalls-362758-vehicle...
The problem here is that this is functionally similar to using an outdated version of photoshop but the consequences are vastly different.