Nintendo Hard

The Stone of Power:
* The "Hard Mode". You can't save freely and the riddles were boosted to ridiculous levels, as well as some general troubles that "Easy" and "Medium" modes don't have. Especially at the start.
The Legend of Devils
* Zig-zagged with the advanced version. In rounded up some places and boosted the level that Hard Mode from 2.0 already had, but most monsters still aren't this hard to beat. For example, the early spiders and snakes are the same as they were already hard to deal with. Most dungeons simply pushed the enemies'/boss's HPs up, others made it more difficult, however.