Knight Lore for the Famicom Disk System was developed by Tose Co. Ltd. for Jaleco with the blessing of its original creators, Rare. It was published only in Japan in 1986.
It doesn’t bear too much of a resemblance to the ZX Spectrum original, other than the basic idea, the isometric viewpoint, and the main characters remain the same. That said: it is not a bad game to play (if you ignore the silly tune that plays when you walk). It’s basically a ‘fetch’ game, where you collect and take objects to a cloaked figure who asks for them.
The game comes on a double-sided disk, so you have to swap sides to load it and make it playable. The text is all in Japanese, but if it says ‘B’ on screen, you know it’s time to switch to side B. And vice versa.
Why this version of Knight Lore was released only on disk and not cartridge I don’t know. The disk swapping is a drag. The game is not too bad overall. Compared to the original, though, I’d say it’s a little lacking. Graphically it’s quite good, although the colours are a bit too… green. Anyway, it is what it is (a little disappointing), but it is worth a play if you’re interested in Knight Lore history.
More: Knight Lore on Wikipedia