@RudyToo

Thanks for that, I'll go see if they help. Mostly here seems to reference things I can't even... Are they even in the (PC) game?
[Edit: Second link seems to be broken.]

New Question:
Earthquakes? How? When? Do I sit staring at my computer for days on end in case one happens? I know I need ropes to explore the cracks, but what about the earthquakes themselves????????????????? (Yes, I apologise for the shouting question marks, but seriously...)