I have had a few people wonder how stuff from my headcanon can be not-canon. Today, I'm going to offer up an example. A lot of my additional Fallout: Equestria headcanon centers around or incorporates elements of the world of My Little Pony: Friendship is Magic revealed in episodes which aired after the story was written. In many cases, the headcanon was invented as I laid out plans for the two Fallout: Equestria PNP RPG campaigns that I have been running for the past year.

Much of my personal headcanon involves the analogues of various Fallout DLCs, which become playgrounds for player-character adventures in the campaigns. These have included my own Fo:E versions of Old World Blues (The Crystal Empire), Point Lookout (Froggy Bottom Bog) and Honest Hearts...

...that last being entirely new part of the world that I called Gaia Valley (as Gaia is from the same mythology as Tartarus), and is not based on any local from My Little Pony: Friendship is Magic. I will admit, I found Honest Hearts to be the most boring and pointless of all the DLCs. Joshua Graham was an amazing character, but shamefully under-utilized. He is easily the most quotable of the characters in New Vegas, if not the entire series... but I came away with little more out of Honest Hearts than great quotes to use in Fallout: Equestria. Zion was pretty, but Honest Heart's main mission was unremarkable, and the side quests were so forgettable that I've actually forgotten all but one of them. The result is that I had only a small kernel of Fallout's DLC that I wanted to grow Gaia Valley from -- the result being less recognizable as an expy than other DLC analogues.

Gaia Valley became a geographically isolated canyon valley where a dangerous rival to Stable-Tec tested its own solution to restoring Equestria in the wake of a megaspell apocalypse. The solution worked! Not without serious repercussions. Still, Gaia Valley was the one unpolluted and relatively safe little place in Equestria, populated by tribes of descendents of the company's "Research & Execution" complex employees who became trapped there -- tribes that traced back to the different departments that had existed within the facility.

I am very blessed to have Mimezinga amongst my players in the game that Gaia Valley was designed for. And I was pleased to be able to incorporate Solaris -- an element from his amazing story -- into my game world (and, as such, at least entertain it becoming part of my headcanon). Now, I should not need to reiterate that no Fallout: Equestria side story is canon to the original story.* So even if Solaris or some other element from a side story becomes integrated into my headcanon, by necessity it cannot be canon.

*As an aside, I actually do have to reiterate that with alarming frequency, usually because people are confused about that unfortunate "Kkat Approved" tag on Project Horizons. I say unfortunate because almost nobody understands what that tag was for or what it really means. (I haven't read Project Horizons, so I don't have any opinion on it save that I am greatly honored, as I am by all side stories. Especially as I admire Somber's writing skill, having read some of his short stories.) At the time, all FOE side story updates were being posted in a single megapost. Since comments for all of the side stories were lumped into the same comment section, this made it hard for fans to talk about Somber's story , and likewise exceptionally difficult for authors of other stories to find the feedback on their works in the flood of Project Horizons comments. Since some bronies objected to a side story being given it's own page, Seth asked me if it was all right for him to do so. I gave Seth my approval to separate out Project Horizons, giving the story its own page.

And, with that, I present to you the memory orb which started the Gaia Valley adventure: