The definition I found was:

Not disclosed; kept secret.

I didn't know it was kept secret.

Undisclosed?

You mean if they manage to do something useful. I'm not sure they can best the existing technologies.

It's logical that a major rewrite is needed once in a pair of decades. But it's surprising to me that after that, the game still changes so much from edition to edition, even with the goals you stated.

The problem is, if the game feels so different on each edition, many people won't change to the new one. I follow RPG.SE, and on that site, there are questions on all D&D editions (AD&D, 3, 3.5, pathfinder, 4, 5) which seems as a huge fanbase, but too fragmented.

Time will say if 5th edition is going to bring them all together.

I am annoyed on the contrary. I am surprised that such a long lived RPG still need to change drastically on every edition. Early editions would logically change more, but I am surprised that 30 years later they still need to make such huge changes between editions. If in three decades you haven't still invented a good skills system, I don't know if they would ever do.

This discussion is reaching higher levels of rhetoric.

Those games may be "engaging" when you want to play a game. When I want to do something different in the Internet, I feel more like annoyed.

AFAIK, it is neither free software nor open source. If you cannot fork it, it's not open source, even if the source code is published.

Open source is that which is open to read, modify, redistribute,... Not only open to read.

Please tell that to Google who don't stop asking for my real first and last name and for my phone number.

I discovered it several years ago, when after accidentally closing a tab I thought "What if I could bring it back", and the combination came to my mind instinctively.

But now, I think it's so widely know, at least for nerds, that I also don't understand how this is in the front page.

What do you mean, Doc? All the best stuff is made in Japan.

Honestly, I don't think I am able to see more youtube content. Why pay for more content if I don't have the time to see all of what is offered for free?

In your browser. Not in mine.

Again, this is what this video is not about. The text is not clear enough, but if you actually watch it, you see that the idea is to stimulate the muscle to give the illusion you are exercing force. It is a more subtle form of feedback.

Still, I wouldn't have bought AGOT DVD if I hadn't knew the series. I wouldn't have known the series if weren't from a "illegal"[1] copy.

[1] In my country is not actually illegal.