ok i on't understand the cave who was using it n where r they

I too have finished the game, and wondering who is in the cave, which makes me think it's worth carrying on for a bit, to see if it becomes clear, sorry i cant be of any help, I would quite like to know too.

There has been a lot of good discussion about that topic in the forums. Here are links to some of the threads:

look here
and here
and here
and here

Isn't it obvious? It's where the game designers have been hiding!

LOL