A good night's sleep in "Dragon Quest III: HD-2D Remastered" is a special achievement trophy in the game, and the requirement for this achievement is to lift the curse of Nornir. The northwest corner of the map Go to the 4th underground floor of the [Underground Lake] and get the important item Dream Ruby first.
How to obtain the achievement of "Have a Good Sleep" in Dragon Quest 3 Remake
Have a good sleep
Lifted the curse of Nonier
From the [Underground Lake] in the northwest of the map, go to the 4th underground floor and get the important item "Dream Ruby". Go to the "Fairy's Hermitage" and talk to the queen to get the important item "Awakening Powder". Return to [Nuo Nier】The cup jumps after using it.
Go all the way to the bottom of the cave in the southwest of the Elf Forest to get the gem. The elf princess fell in love with a human and the two died in love.