What does the launcher do with regard to the operation of the game that cannot be done within the actual game itself? Is it due to a technical limitation or simply there for the convenience of the players? Are there alternatives to such methods of starting the execution of games?
This also works with any Unity game which prefers to launch through a launcher.
If it’s an online game, like an MMO, they might put your account on timeout if you keep playing some outdated version of the game, though.
I’m honestly surprised you can even connect to an MMO with an out-of-date client. On the few I’ve played, at least, a version mismatch is an automatic refusal to connect.
I’ve had Black Desert letting me play a bit with an outdated version (I didn’t know there were updates, I hadn’t used the launcher for a while) but it gave my account a time out of 10 days after my play session.
I was also surprised it didn’t just go “Nope, update first!” immediately, I kind of expected that would be the case if I didn’t use the launcher.