For what's worth, there was one that I almost thought there was something missing. Might be that one, but I don't remember if it was regarding a chest. All glyph things I came across I found their use, so I'm certain that in my playthrough, there was nothing missing and I was very throughout.
From memory, the one that got me confused was on a square like room, with something like a tree in the middle, and you could find glyphs on the walls in that room. Is that the one?
Got it. I won't be playing the game so soon, but if gets to that before all the mystery is solved, I'll check into it. That Vault would make the planet produce Helium, right? ...
That's odd, now that I think of it. The vault was supposed to help with terraforming ... and the Scourge seem to be the problem collapsing that world. Or was that vault built after the planet was partially destroyed? Certainly, terraforming wouldn't mean making that vault to produce Helium. But it's beside the point of your first post, then I'll let it rest. ^_^
