OK, after making myself look like an idiot for several years now, I've finally figured it out for myself.
This is a crediting list for all content for Command and Conquer 5 Return of the Scrin. Originally Posted 14-04-2017. Updated 30-11-2020.
You can tag anything on ModDB on ModDB, and all tags can be voted up/down by the community depending on their relevance.
Official tags, as well as up-voted tags will appear higher in the list as they are deemed the most relevant.
If you discover a page that does not have any tags applied, why not help out the community by submitting tags, or posting a comment with #tags in it, which will be automatically linked.