I really do wish it was all that simple, but I cannot help but stare rudely at the errors in GURPS.
Seabolt made up stuff from his own imagination (digging mandrakes will kill men and dogs [did he ever even play, for example, Relic where you send units to dig up roots?]) and things he just plain overlooked in the game (the Deceiver's fate at the end of Shiver), etc.
I can't tell all the time when he takes a genuine Bungie idea and adds his own stuff to it, or simply takes his creative freedom and starts his own little additions to the universe. Sure, some stuff in there is from the prerelease info, but since Bungie didn't/couldn't implement it, does it even exist as canon?
I can hear it now: "Welly, if Seabolt says something in GURPS which was in the prerelease info, it is canon because that means he talked to Bungie".
Personally I see it like this: "If Seabolt says something in GURPS which was in the prerelease info, it means that he had contact with Bungie". That's it.
And we know for certain that prerelease info cannot all be held as canon. For example! I have copied and pasted the below prerelease info.
"The following text taken from Bungie's Myth site:
The story of Myth centers around a deity which appears in this world in cycles of a thousand years. During one cycle the deity will appear as a Savior; in the next, as a Destroyer. At the beginning of Myth, The Fallen Lords, he has returned in the guise of Destroyer, with the Fallen Lords, a group of resurrected and powerful generals. These beings and their legions of undead and spirit forces rise up to destroy the living beings of this world, while the player controls the living and tries to stop the onslaught."
The above prerelease info says it is the same creature which alternately is Savior and Destroyer. However, unless this creature can be at 2 places at the same time, this is impossible. Further, and much more importantly, the whole possibility of the Leveler ever being a hero is proven wrong in the Myth II epilogue right here:
"Although the hero of every age of light is different, every dark age is ushered in by the same beast[...]"
So, we cannot take prerelease info as canon since some of it was very clearly decided against... unless it is corroborated by the games or manuals. So, we're back to Square One, which means that if something GURPS says isn't corroborated by the games or manuals, it is in question.
-Welly
