> Its trademark claim covers the use of the word in connection with many aspects of tabletop gaming and video games, she said, but also extended to published works.
One should note that they claim trademark by 'common law', ie they argue that the association of the term 'Space Marine' with Warhammer 40k is so well-established even in the realm of ebooks that they own a de-facto trademark without having a registration (yet).
Basically, GW is the largest fish in their pond. They are trying to expand into a bigger one and are testing the waters by eating their first small fish.
> Its trademark claim covers the use of the word in connection with many aspects of tabletop gaming and video games, she said, but also extended to published works.