I have all the entrance stones, and I reached the model city room in the Knossos Labyrinth, but I cannot for the life of me get through the Worldstone puzzle. It says in the Lost Dialogue, "with only a waning moon to protect the city from grim night." Obviously, it means align the waning moon above the city. I tried various sunstone combinations with that, and NOTHING works! I've even tried aligning the sunstone to what it previously was at the Labyrinth entrance, and that doesn't work either. Do the symbols have to be aligned with the horns for it to work, or is it different?

Could it possibly be a bug with ScummVM?

I know I've beaten this game before on the Nintendo Wii version, so I wonder if it's a PC issue.

The Dialogue entries are somewhat unhelpful when it comes to the Worldstone in Crete - sometimes the alignment is all made directly under the horns, sometimes one of the elements actually needs to be completely opposite the horns. Basically your clue means that the City and Waning Moon should indeed both be somewhere under the horns but then the rest is guesswork. It's pretty quick to spin the stones in modern versions of the game, so just keep trying all the combinations where the City and Waning Moon are somewhere beneath the horns and eventually you'll get the answer.

NOW, I got it to work, after much guess work and experimenting with other versions of the particular LDoP clue. Look closely at the image I provided. The combination is wrong under the horns, but it is correct when it is pointing right. How does that make any sense?

I remember reading one post by a player saying that sometimes the discs had to be rotated 90 degrees. Would you mind posting a screenshot of the Lost Dialogue page as well? Perhaps there is a missing clue (or maybe it's just an annoying bug/oversight).

Edit: I have another idea. Sometimes some pictograms have to be aligned in a position different than the horns. Was there any mention of the setting sun in the Dialogue? If you place the setting sun aligned with the horns, then the night in the solar disc falls on 3 o'clock, so "with only a waning moon to protect the city from grim night" would mean that the waning moon and the city need to point to 3 o'clock as well. The full text of Plato's Dialogue or a screenshot would be helpful.

Yes, of course it does.

Each clue needs to be added on to the previous ones, and there is only one way to use those three clues in sequence, no trial-and-error needed.

If your screen capture shows the combination that finally worked, then the clues you had were:

"[...] if sunset made the tall horns red." for the Sunstone

"[...] with the sun dying as a new moon is born." for the Moonstone

and like you already said, "[...] with only a waning moon to protect the city from grim night." for the Worldstone

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A bit on the rationale behind the clues:

The Sunstone clue simply tells you very clearly which symbol to align with the horns. There are four possible clues.

The Moonstone clue tells you which symbol from it to align with one of the Sunstone symbols. There are four possible clues. Two mention the full moon and two the new moon.

The Worldstone clue tells you which symbol from it to align with either one of the Moonstone symbols or one of the Sunstone symbols. There are eight possible clues, but after setting the previous two stones correctly, there are four sets of two of these clues that represent the same final position of the three stones each.

None of the symbols mentioned in the second or third clues need to be aligned to the horns. If they are, it's by pure chance.

Of the possible total of 128 combinations of clues (for 64 stones positions), not few will result on the symbols mentioned in the clues to be aligned with the horns in some way. If I'm not doing the maths wrong (which I probably am), they should be half of the combinations.

For the first two, the chances are two in four: the Sunstone clue is always what symbol must be aligned with the horns, and then each one of the Moonstone clues mentions one of the Sunstone symbols, but since the Moonstone clues only mention either the full moon or new moon, then the mentioned symbols (which can be 2 or 3 at this point) can end up aligned with the horns, either on top, if the symbols mentioned are two (the same Sunstone symbol mentioned in both clues), or on top and the bottom if they are three (the symbol of the Sunstone opposite to the one mentioned in the first clue is mentioned in the second clue).

If that is the case, upon trying to use the third clue, you could find yourself thinking that the Worldstone symbol mentioned in the clue must also coincide somehow with the horns or, even worse, that both symbols mentioned in the Worldstone clue must coincide with them. This happened to me on my first run of the game in '92. I was able to pass through on pure trial-and-error, and even after seeing the final resulting positions, I did not understand what was happening; until I replayed and realized my mistake because the clues were very different that time and did not induce that faulty reasoning so easily.

If your third clue had been one of the following:
"[...] with the rising sun breaking night's grip above the fiery peak."
"[...] with darkest night soon to rule the western sea."
"[...] with the moon, full of beauty unrivaled, lighting the city."
"[...] with the dying orb plummeting into the eastern sea."

Then we would not have this thread and be talking about it, since all symbols mentioned in the clues would be aligned with the horns (the vertical line at least), and you would have just thought that everything was "as it should be". :P

"youtu.be/nMSDHryYsb4?t=6975"
I tried this combination but it didn't work. Any clue?

It should be clear from the rest of the topic here that each run of the game has its own combination of clues. Did you read my post?

You need to position the stones according to the clues given in your in-game copy of TLDoP. And when using the three stones, all three clues must be followed.

If you already opened the doors corresponding to the 1 and 2 stones combinations, opening the one for the 3 stones combination should be really easy, even if you don't understand the third clue.