Have you SIRD NO MOOR TIRIPS EHT TSAP TOG? (reverse this text to read)
No.
I assume this is the location behind the archway, since it is the only area I am unable to enter on that island.I do not know if the problem is with guessing the correct command, or if I am missing something I need.
To open the archway you need to SGNIVRAC EHT HTIW KCOR EHT DNIF
Thank you for the help.
I visited every location on the island already.
I did not realize that part of the boulder could be examined separately and was trying to interact with the wrong thing.
Now I believe I have what I was missing and can say goodbye to the island.