You start in a tent, with no recollection of how you got there. You begin to build a more permanent house, using whatever materials you can find. You utilise whatever you have to eat. You construct basic tools from the raw minerals that exist on this barren island. You find treasure and ruins and amazing cave systems. You survive....

This island was randomly generated on the seed. I searched for one on a boat, so you can find mainland if you sail long enough. Good luck!