itch.io

I do not think that complaining about the quarantine will make Itch staff work any faster. And Itch staff is whom you would have to talk to. Not to people commenting on a public message board. You do not know why your games are quarantined. Staff will sort it out, eventually. Give them a few weeks.

And for your information: there is malware that will not even get detected on virustotal. I have seen such. Published on hacked accounts. Why do I know it was malware? Because the account it was published on, was a hacked user account among other things. It problaby would have downloaded the actual malware later. And this (the hacked user accounts) is the reason why I welcome a sensitive quarantine system. I only see the hacked accounts with indexed malware that were not quarantined and those are plenty. So if their system catches some false positives, bad luck for those devs. They have to wait till it clears up. The alternative is even more hacked accounts with new malware distributed, if the automatic is not sensitive enough.

This thread is a public service announcement about a scam that was popular three years ago. It might still be popular. Typically they are/were restricted games and a direct link with password protetected file would be advertised on discord. To try the game. For testing or whatever. But this is not the only method by which malware is distributed on Itch.

To quote from the initial post: 

itch.io is a self publishing platform open to all, which means anyone can publish a page on our platform at any time.[1] Although we have many automated checks to block or suspend users if suspicious activity is detected

The bold text is what probably hit your games and put them into quarantine, till staff will sort it out.