HTH Dialog Developers Group

Yes, patch contains only files that have changed since the version it is patching. That's why it is only ~100MB, not 1GB.
You need a full package in the beginning. In this case it's the version 0.669. Then overwrite outdated files by patch 0669-to-0670-minus-1/2 and then overwrite again by files in patch minus-1/2 to minus-1/4.

I've some difficulties with uploading anything above 100MB to Anonfile, including this patches. I can't upload to Mega at all. The only site that I found to work with Tor for files of 1GB size is the yiff.party But that one is not supposed for unfinished versions.

However, this version is for dialog developers. It works, but most characters have unfinished dialogs and some have no dialog XML files yet. So you have to make these yourself. There is a manual in the package.