Probably missed one action. There are a few that are easy to miss.
ie Once you drive all the way to Santorini, then to Astrape, there is a path from Astrape back to the dam or from the dam to Astrape, which is unlikely to be used, as you run out of resources attempting it.
If you've found two sets of crates in different locations, you will have picked up a new name (your character remembers this even if, like me, you immediately forgot what it was). You can do a small bit of research on this new lead at Laurion.
