[2022] A bold, and direct question to mods that I know will read this: Are there any existing in-game secrets that we as a community have not discovered yet?

There is one with Solak that hasn't been found yet. It's extremely rare and can't be forced by doing a certain combination of things. It just happens.

No hints.

I guess I can give a bit more info on this now ^^
- First of all, the text that I added isn't some profound lore drop or secret info, it's just flavour dialogue, but it just happens to only be able to be found in one specific location with specific conditions met, so you wouldn't really find it by just playing normally. And, at least judging by the wiki, no one has found it yet.
- You need to have interacted with other players at least once in a specific way to be able to get to it.
- It is new dialogue, but on a previously existing NPC.
- As Will said, it was added as part of a ninja strike between October 2020 and September 2021.
- A new hint maybe...if you find the correct wiki entry, it states that what I've added isn't actually there, directly disputing what is now the truth. ^^

That shouldn't make it too hard but hopefully not too easy to find ^^ Have fun :)

Yep, that's actually it! Didn't expect it to be found so quickly after I posted the above comment haha!