I have a game that is paid. It's a visual novel that's in development and is updated every 3 months.

Can I create a duplicate page with a free previous version? For example, the paid version will be 0.8, but there will also be a separate page with a free version of the game 0.7, which will also be updated every 3 months.

I know that on the same page with the paid game, I can add a 'Demo' version, but then the game doesn't show up in the 'free games' list.

Sure it's allowed, where other options don't make sense, like here.

There are some games that try to use the individual priced files mechanics for that. You can have a file on your project page that has a minimum price. Only people that have donated above the threshold can access it.

But there are all sorts of issues with that approach.

Maintaining a public version and a paid version is much cleaner and I believe was even recommended in another thread