I'm going to look into what might be missing from those three. The only two I know of that aren't listed in Egypt are the Queen's hideaway and the criminal HQ. Any others will take some research, so give me a heads up on what ones you have explored that aren't listed.
I don't have any saved games right now that have full exploration of all tombs. I did new Sims for each of the guides, and my first Sims were much more laid back about travel. Those three were intended to be a foundation for future information anyway, so we'll work on trying to make a definitive list of all tombs, not just those related to good adventures and involving tomb collections.