Not just an expired cert on a server for the site's static assets?
Yeah, it's probably a benign explanation like that. Title changed from "Gog.com has been hacked" to "Gog.com homepage is glitchy"
yeah, that seems to be it. primary domain has a DigiCert cert valid from Feb 2023 - Feb 2024, but gog-statics.com uses Let's Encrypt and it expired about three hours ago.