Stranded Deep

This achievement is pretty self-explanatory albeit quite tedious. I would recommend starting a new playthrough for this achievement alone so nothing is to be confused because quite honestly this achievement can get confusing if you're just going without preparation. Before you start your playthrough, give yourself a break and record on a piece of paper the basics of your map so you can at least have some bearing as to where you are, I didn't do this at first and decided to just wing it with 10 islands, needless to say that was the biggest mistake I had for this achievement because things got very confusing by island 6 and I was finding myself visiting the same islands two or even three times. You can build a better raft although I just used the original life raft, the 3 days of rations that come along with it should also give you more than enough to at least get eight campfires, and then you can just go to the last two islands without issue especially since most islands have coconuts to drink and eat. If you have the map of your playthrough recorded down, the only issue is the time that it takes to get from Island to island.

Fun fact: I live in Ithaca, NY. Thought that was funny.