And then there's the weird situation I've mentioned before with World of Warcraft novels, where not only are they as canon as the primary media that is the game itself, but oftentimes major storyline developments are shown exclusively in the novels and only ever referenced in the game rather than depicted. (Though that's probably additionally weird in the sense that the reason it's even feasible is because as far as I understand things, their novelists are basically given a very general outline of what should happen in the novel by the game's writers, and allowed to expand on that outline how they'd like so long as they stick to the essential framework.)