Fire Emblem: Three Houses fans who really want a challenge can give the game's Maddening Mode a shot, which certainly cranks up the difficulty to some pretty intense levels. In an interview with Famitsu, co-director Toshiyuki Kusakihara discussed the challenge of developing that mode.
After the game was initially released, we heard that a lot of people weren’t satisfied with the game’s difficulty – Maddening mode seemed to be pretty well received with that crowd. Nevertheless, fine tuning the mode was actually incredibly difficult. The characters’ strength can vary greatly from player to player depending on how they spend their time at the monastery. We were mostly concerned with keeping everybody playing even in more challenging situations – that was pretty difficult.