HTH Dialog Developers Group

So far I found:

1. Stars puzzle in Stone Key Ruins:
Click 9 stars (9 hidden buttons), of which one is barely visible behind screen top dark header with menu items.
This opens portal to Vaultus

2. Stone Circle puzzle in Stone Circle Ruins:
You need to gather those color balls to make the puzzle solvable. Deep dive into file scripts suggests that this puzzle was meant to lead to 4 bonus locations, using balls as keys to each one. But it has been changed since, so Vaultus is not accessible from this puzzle anymore.
Puzzle works following: first choose one of glowing arrows (need ball for each) then wait until particular highlited symbol on rotating ring matches the arrow position and click on that symbol.
Balls:
a. Brown/green ball located at Stone Circle Fountain ground: Activates arrow at 45 degrees and gold glow symbol for Aztier (piramid).
b. Blue/purple ball located at Library walkway: Activates no arrow, activates blue glow symbol for Octus (need D ball first).
c. Red/yellow ball located in Rose's room trunk: Activates arrow at 270 degrees and red glow symbol for Naranvad.
d. Green/blue ball at Naranvad down on floor: Activates arrow at 225 degrees and no symbol for Octus (need B ball to solve that arrow).

I've inspected scripts for all 4 bonus locations. There is literally nothing (besides that one ball). You can't do anything there, you can't get anywhere further from there.

So far I have no idea, how to get to HTH1 from the game, it was possible in online version years ago. As well as what to do with rose book and nariatt stats.