The Dark Souls franchise has some devilish secrets. Take take just the third installment as an example.
One trophy ("The Usurpation of Fire") requires the player to perform 11 different actions across the entire length of the game in exactly the right order. This often involves talking to seemingly unrelated people or doing things at opposite ends of the game world. Performing actions in the wrong order or performing some other actions invalidates the entire quest. How do people even figure out what they are supposed to do and which exact things need to be avoided to make this possible?
Another example is a secret area (Archdragon Peak) which can be accessed only by performing the correct gesture at exactly the right spot, with no obvious guidance that this is what you need to do.
The series has many more examples, the secret in the bird's nest in DS I being an example that comes to mind.
Are there documented examples of how these kinds of secrets were first discovered by the community?