In my experience, gaming worked great on Linux Mint. Overall, you may encounter issues with online gaming but only because the servers will see you’re using Linux and decide you must be cheating. Not really an issue with Linux, more an issue with the devs not doing a proper job.
ProtonDB is a good resource to understand what games run well on Linux and what issues you may encounter.
In my experience, gaming worked great on Linux Mint. Overall, you may encounter issues with online gaming but only because the servers will see you’re using Linux and decide you must be cheating. Not really an issue with Linux, more an issue with the devs not doing a proper job.
ProtonDB is a good resource to understand what games run well on Linux and what issues you may encounter.