Fisraduth: Castle of Tyramis

You control a knight with a sword that can swing high or low, and you fight creatures that can hit you or shoot things at you. Along the way you gain a shield that can block projectiles and can increase your armor/sword strength by going into rooms (including secret rooms) to collect powerups. You are usually limited to a single background in Family BASIC. Fisraduth uses darkness to hide portions of the background to give you the feeling of multiple rooms. There are even hidden, secret rooms.

Published in Micom BASIC (マイコン BASIC) 1988/01 magazine as a type-in game.