I’ve played (though not necessarily finished) Ys I & II, The Oath in Felghana, Ys VI, Ys Seven, and now, thanks to the Summer Steam Sale, Ys Origin.
I haven’t played Ys IV: The Dawn of Ys, Ys IV: Mask of the Sun, or Ys V: Kefin, The Lost City of Sand.*
I am looking forward to Falcom’s remake/reimagining/reboot/retcon/whatever of Ys IV, Ys: Foliage Ocean in Celceta.** It’s scheduled for release on the PS Vita in late September, but I expect XSEED Games will translate it and bring it over to the US (since they’ve brought over other Vita games, and have done their damnedest to bring over all the Ys games they can).
I haven’t let that stop me listening to music from the games, though, and SSH’s cover of The Dawn of Ys is great. And mixing in Iron Maiden is a nice touch.
*Yes, there are two different versions of Ys IV, made by two different companies (neither of which was Falcom).
**I love Falcom, but they need to work on the literalness of their translations. 樹海 does literally mean “foliage ocean,” but it refers to a forest so extensive that it is like the sea (For example, Aokigahara, the forest at the base of Mt. Fuji that is so popular for suicides.). I think the tentative initial translations as “Celceta: Sea of Trees” were better, but it’s their game, and they can name it how they choose.