WMG / Myst

Myst was trashed by pirates from Mechanical
Sooner or later, they'd realize that the fortress is no longer inhabited. Some pirates might get curious.
  • Yeah, I'd say leaving a Myst linking book in an age like that is a pretty bad idea.
    • Agreed. Sure, it's locked up... by a combination that's written down in plain sight. You have to figure out the puzzle that lets you get to the combination, but the pirates just have to sail up to the other islands with their ships, land on the shore, read the answers, and put in the combination!
    • My guess would be is that Atrus merely committed the combination to memory, and when it no longer became necessary to remember (retreat of Black Pirates) he installed those pedestals so he could leave when he wanted. Also, TBP are no longer a threat. The sky of Mechanical was originally stormy and gray, and wouldn't change until all the black pirates were killed. When you link there, the skies are blue and clear.

All worlds have a linking book.
There was a past Golden Age where the D'Ni were either ridiculously creative and/or generous and taught their Reality Warper methods to other peoples. How much a particular world follows the Rules Of Index and/or takes Acceptable Breaks from Reality depends on the author.

Related to this WMG...

All Reality Warpers are D'Ni.
...and are Author Avatars having fun in their own world. Insert Haruhi jokes here.

All of the series' Ret Cons are the result of someone writing in Earth's Descriptive Book.

The parody game Pyst actually takes place in the canon timeline.
Anyone who has seen the bad endings in Myst V would certainly believe this to cope with seeing Myst's current state. Because the Myst series of games existed in-universe, it would be a matter of time before gamers saw the ruined island and once the books linking there were salvaged; a mass load of tourists would turn Myst into the place seen in the parody. This would also make "Pyst" the last Myst game in chronological order.

Atrus and Catherine are liars
Word of God holds that all of the Myst games were based off of what Catherine wrote in her journals. The only games that were portrayed according to "real life" events were Myst V (based on what Richard A. Watson did) and Uru, hence the many Ret Cons. Of course, Literary Agent Hypothesis can go both ways. Atrus and Catherine could have recorded anything they wanted into their journals, effectively changing the past and there wouldn't be any way to prove them wrong.
  • What Ret Cons? Besides the Prison Age one, which was explicitly mentioned to be a shortcut for gameplay (not that that makes sense as an answer...), the only ones I can think of are those related to the rules for linking between Ages, which only apply to the Bahro and to Yeesha.

The shape of an Age's inhabitants is subconsciously affected by the shape of the Writer.
This explains why every single sapient inhabitant of every single Age that is explicitly named are Human Aliens: Atrus, Gehn, Catherine, and other Writers simply haven't figured out how to adapt Xenofiction to the Art. In fact, it may be likely that a Xenofictionally-written Age would simply fail to link, or be so alien as to be worth nothing to the D'ni other than resources. This might be why the Bahro are enslaved by the Tablet during Uru and Myst 5: the D'ni Wrote the Noloben book xenofictionally, only to find out that the Bahro were (in their opinion) only fit to serve them, and thus the whole endeavor was a failed experiment. Alternatively, The Bahro gave the Tablet to the D'ni as a peace offering, a specieswide surrender perhaps after a genocidal war. This in turn explains why Esher was so quick to write off the Bahro's form of linking as "an abomination" in Myst 5.

Related to the above, using a proper noun when altering a linking book, locks the link to that world
For example, changing the link to reflect that Ghen is in Riven locked that version of Riven for that linking book. This in turn probably has drastic consequences when one does further changes to the link (think Stoneship age). These changes probably work by pulling elements from related ages into the now locked age, but not necessarily placing these elements into the Age as the writer intends.

When Atrus dies, his body will be interred on Tay.
That is doubtless where Katran was laid to rest, and he will want to be interred with her.
  • Or, if the D'ni and Tay don't prohibit the practice of cremation, Half his ashes will be on Releeshahn with his people, and the other half with Katran.

The Stranger is Will Navidson.
... Or rather, the protagonist of Myst and Riven is Will Navidson. In House of Leaves, it is never detailed how long Navidson disappears into the labyrinth for or how he gets out: this is because while inside the labyrinth, he discovered the Myst linking book that Atrus originally threw into the Fissure (in Myst, it is discovered by the player in what appears to be an endless black void). When he collapses into the Fissure as happens at the end of Riven, he "falls" back to the real world. This is backed up by Myst: The Official Strategy Guide, in which the main walkthrough is narrated by a man who has a camera: "Carrying case, plenty of film. If I couldn't document this place, nobody would believe it". The only flaw with this theory is that the protagonist of the Guide walkthrough starts his journey in a library, rather than in a black void. As a side note that is slightly related, the makers of The Starry Expanse Project discovered that the Temple on the first island of Riven is larger on the inside than it is on the outside. Make of it what you will (explanation starts about 9:00 minutes in).

The Stranger was drawn to the Cleft by the trapped Bahro.
A small problem with putting the exit of the Star Fissure by the Cleft is that it conveniently draws all the events of the Myst series far enough away from any kind of civilization that there is no explanation for how the Stranger, an outside observer on the trials and tribulations of Atrus' family tree, was able to enter the story to begin with. However, in Uru, an NPC in the first area mentions that lots of people had been drawn to the area, and Yeesha implies that it is her doing, with the intent to free the Bahro from their chains. (This is presumably after failing the Tablet quest as shown in Myst V, as if she'd figured out the right thing to do with the Tablet, Uru would have no plot). Given that by this point, Yeesha had all the powers of the Bahro without the humility to let them go as RAWA did at the end of Myst V, at one point the Bahro must have had the power to send out a subconscious call for help, which they undoubtedly would have used, if not before the Fall of D'ni, then definitely after. So who answered this call for help? The Stranger. What did he do at the Cleft? He found the Myst book, setting off the events of Myst and Riven, thereby reuniting Atrus and Catherine, and forging a friendship borne of gratitude that would eventually lead to Yeesha becoming the Messiah of the Bahro and setting up the plots of Uru and Myst V. Of course, there's no way the Bahro would be able to extrapolate that out, which is why they didn't try the call for help again until Yeesha set up the journey cloths and the plot of Uru.

The song "Dragostea din tei" was actually written by Saavedro about Tamra.
The chorus translates as follows:

You want to leave but you won't, won't take me, You Won't, you won't take me, you won't, you won't, you won't take me (referring to where Tamra and Saavedro's two daughters fled, where he now wishes he could have followed them) Your face (as depicted on the laboratory wall) and the love from the linden trees, (or rather, Lattice Tree, changed by O-Zone as the Lattice Tree would be unfamiliar to most listeners) They remind me of your eyes. (the one part of Tamra's face that Saavedro still cannot properly reconstruct)

Veovis was in love with Atrus.

It's somewhat out there, but it would explain why he used to torment Atrus when they were at school, why he wanted to reconnect with him at the start of The Book of Ti'Ana and also why he developed such unfathomable hatred for Anna.

The Bahro are the true inventors of Writing.

We know they've been subjugated by the D'ni for thousands of years, and their ability to Link at will seems to be innate to their species. The use of Bahro symbols in End of Ages suggests that their version of Writing is actually more powerful than that of the D'ni, as their tablets can do things with a single glyph that a D'ni Writer couldn't manage to do with an entire book's worth of script. Finally, Esher's resentment towards the Bahro species is so extreme as to suggest he knows something about them that repels him utterly, far beyond what their non-human appearance or behavior would account for.

So, rather than the D'ni having discovered Noloben, and enslaved the native Bahro to take advantage of their natural Linking abilities, perhaps the Ronay ancestors of the D'ni were themselves discovered by Bahro explorers, killed them because of their weird appearance, and stole the tablets they were carrying. Using the stolen tablets, possibly aided by patches of Bahro skin, they reverse-engineered a crude form of Linking and Writing of their own, that wasn't nearly as efficient (too many words required) but did have the advantage of using paper or cloth rather than stone. They used this new technology to spread through the Ages, eventually stumbled upon the Bahro homeworld, and quickly subjugated the beetle-creatures for fear the Bahro would avenge the slaughtered expeditionary group.

Yeesha duplicated and personalized so many Ages...
...in case Uncle Sam repeals freedom of speech or civilization goes ashcan in some other way. Many secret places for a Samizdat to preserve crimethinkful writings (or writings in general), and many secret way stations to hide refugees en route to Releeshahn.

The Star Fissure is Catherine's first age.
In the Book of Atrus when Atrus fell into the Star Fissure it described him as having the fireflies of Catherine's age... Basically Catherine wrote a huge linking panel into her first age.

The idea that Sirrus and Achenar (and potentially Gehn) were trapped in separate Ages rather than in empty voids really was planned from the start, rather than a Retcon decided just to bring the brothers back for Myst IV.
Looking over at the Fridge page, a couple people have noticed connections between the first game and the two prison ages in Myst IV- the locations of the pages in the Selenitic Age matching the prison ages, and sound effects used in the first game's bad endings also appearing in those ages. It would be pretty strange for the developers of Myst IV to have specifically seized on that one age's environment to base the prisons on unless it were already planned. So, why were the traps presented differently in the first two games? The Law of Conservation of Detail. If the player were informed that Sirrus and Achenar were sitting in entire separate ages in the first game, they'd want to visit those ages. But they aren't relevant to the story at all, so there's no reason to go there. If the ages were made explorable in the bad endings, where it'd actually be logical for the player to be there, players might get confused and think there were more puzzles to solve to continue the story. So instead, they modified the presentation to make it seem like Sirrus and Achenar weren't held anywhere the player might want to go.

Esher was the first person to call the Least "Bahro".
He picked it up from Atrus et al.'s reports from Terahnee.

The Selenitic oasis has spread to more of the island by now.
The meteor storm occurred in the Seventeen-Eighties or -Nineties. There has been plenty of time for forest regrowth.

Sedona was in a triple star system.
If the supernova were anything but a Type 1a, there would have been no time for a habitable zone to stabilize beforehand. Therefore Sedona likely orbited a main sequence star which, in turn, orbited at a distance two close-orbiting old stars. Probably two white dwarfs, though, since the Maintainers would know that a red giant spilling gas onto a white dwarf means the system is not stable. Therefore, the Maintainers would have decertified Sedona when these two white dwarfs' orbits started deteriorating.

In the ending of Myst, Atrus moves his sons from prison books to prison ages.
He wrote the two ages before mastering the art of making prison books. When he figured out how to make a one man prison, he decided to recycle those ages as bait. Before burning the books, he fixed the slight imperfections in the descriptions, which instantly linked the occupants to the destination age. Once there, it took them a while to realize that they'd just been transferred to a bigger cell.

The Stranger is one of Zandi's anscestors.
Zandi is real chummy with the D'ni. Atrus's family probably stayed close with the stranger's descendants across several human generations.

The New Mexico Department of Natural Resources has commissioned a Writer from Releeshahn, Averone, or Tay to Write another Age for the invasive predators on Aurack to be resettled.
It is likely that the original Age they were from is lost, but one could Write an Age to which they are also native.

The D'Ni are Planeswalkers
And their methods are most widely taught on Kamigawa.