Ideas for next upcoming game.

[Googolplex]

So I don't want to create ideas of the mainly game but there are some background things, good games should have.

A game should have hidden dungeons you find only if you find out a combination of some kind without information of that by random.

If you have played the game to the end, you mean you have seen all things. But you have not seen the hidden contents.

For example you operate a hidden lever that is not part of the game but its the way for the hidden content. This lever should be hidden so good, that nobody is able to find it.

It would be very great, if you see a new level in Amnesia, that you have never seen before! Just because you have not found it.

This hidden contents should be special levels. For example a long ladder which is leading into the dark unknown and there you can find optional information or if the developer want it, eastereggs.

The normal player should not find that. It should be hidden so good, that if you knew that in this room is a lever and you does not find it by searching up all millimeters of this room.

For example you also have to create a special mechanism with boxes or chairs that you normally never find out (and without information about that).

This would be very great so the game is more than you think to mean.
Or you find some super secrets like passages to a hidden chamber or so.
Penumbra Requiem had a lot of this things, but they are not hidden enough.
It should be hidden, that you never are able to find it out.