It's no surprise, then, that when Falcom started getting its games ported to home consoles the same year, with Dragon Slayer Jr.: Romancia on the Famicom, that Ys would be a perfect title for that market.
In terms of the plot to the original Ys, it's understandably basic. A young man with red hair named Adol Christin hears of monsters roaming about on the island of Esteria, home of a silver metal called Cleria, and a mysterious "Stormwall" surrounding the island that makes actually entering it nigh-impossible. Being the adventurous type, Adol decides to test that claim by entering Esteria by boat, only to wind up shipwrecked... Luckily, though, he still managed to enter Esteria, & eventually finds his way to the town of Minea. From there Adol finds out about the six Books of Ys, which tell of an ancient land that once was a part of Esteria, and he'll head to the nearby village of Zepik, Solomon Shrine (or "Salmon", in some Japanese romanizations), the Rastin Mine, & finally Darm Tower to recover the Books of Ys & figure out what happened to both Esteria & Ys itself. In the 35 years since Ys' original release on the PC-88, there have been seven different ports to video game consoles & handhelds, so let's take a look at all of them in chronological order & see what each one brought to the table. Three of them were simply Ys released on its own, three of them were double-packs with its sequel, 1988's Ys II: Ancient Ys Vanished – The Final Chapter (which finishes the story & sees Adol head to Ys itself), and one of them is both individually sold & as part of a double-pack, at least in Japan. In the case of these double-packs, I'll be focusing primarily on Ys I, as the appeal of this game is in how enjoyably short it is (no more than 3-7 hours, depending on how much you know in advance), which makes comparing these ports easier to handle.