A lot of folks replying to this with "you can't copyright gameplay" and of course that is correct, in legal terms. But with IP (as with so much in our society) it doesn't actually matter what the law says, it only matters how much money you have.
A free software author cannot defend themselves against a billion dollar corporation in court unless they are willing to risk ending up homeless on the street.
From: @jasonkoebler
https://mastodon.social/@jasonkoebler/112056599668035942