Hi,

Is there a good way to work on a novel collectively without knowledge of Version Control Systems?

The novel is gonna be written in RenPy and I'm afraid of conflicts in plain text files (unlike images and sounds).

I personally know git/etc, but my colleagues don't. I thought the Dropbox's Shared Folders might suit our needs well, but I can easily imagine editing conflicts (gonna be a horror). Maybe something like Google Docs' instant editing is possible for local plain files? Just an idea... Also, all files must be accessible locally.

There are graphical front-ends for version control systems. There are version control systems much easier to use than Git (try Bazaar). There are services like GitLab, where you can also edit/upload files through a web browser.

Or you could use a strict editorial workflow. In other words, do it slowly and painfully. Ask your colleagues what they prefer.