User blog comment:Enderlucario/IS there a strict definition of what is "official, commercially-published media?"/@comment-1197011-20180808222254/@comment-1197011-20180809013235

Well, most of what you said is right. But the amount of people who know about something is rarely relevant in these cases.

For instance, any books or comics that managed to be published on paper and sold in bookstores are allowed, even if they're no longer available. Shows that have been featured on TV are allowed, even if only one episode was broadcast. Many indie games can be allowed, if they can be purchased in stores. And so on.