@bisonhero: You're right. La-Mulana really makes use of its archaeology basis and requires more than just dexterity and patience. I feel like people who describe Rogue Legacy using the term "metroidvania" are being disingenuous. It's just a randomized platformer set in a castle with "permadeath" (though not really) and leveling up certain skills or abilities that do nothing to actually gate your progress. La-Mulana is all about puzzle and ability/equipment gating.
Disclaimer: I have not beaten La-Mulana, but I have beaten Rogue Legacy.