Depresiv's El Archipiélago is one of the greatest fantasy IF games in the Spanish language. After finishing it a few years ago, I wanted more, but learned that Depresiv had been silent for years before I ever discovered his few works. La Casa al Otro Lado de la Tormenta did not disappoint. The fantasy world, story, interactivity, and action kept me glued to my laptop whenever I wasn't stuck.
This is one of the first truly retro games I actually bothered to complete. I didn't even know what an emulator was. I recommend the emulator QAOP by Jan Bobrowski. It works from your browser and has buttons for saving, etc. which a lot of emulators don't facilitate so well.