The classic NES is not only famous for saving the dying video game industry back in the 80s or its amazing library of video games, but it is also renowned for its overly difficult video games, and these difficult and challenging video games are famously known as the NES hard video games.
This term mostly stands for the game that might be very difficult, but very enjoyable too. For example, Batman from 1989, which is widely considered one of the best Batman adaptations in video games, however, it is also one of the hardest NES and Batman video games ever. This combination of a good and difficult game on the NES platform makes it "NES Hard."

Classic NES Hard video game is coming back with a new title
Another NES game that earned this title is Ninja Gaiden. The first game came out in 1988, and it instantly became a huge success among gamers. Despite its extreme difficulty, it is still one of the most famous NES video games ever. Ninja Gaiden is actually a trilogy of video games, and all of the titles were huge successes.
Ninja Gaiden series is often considered NES hard for its immense difficulty
Another thing that was truly famous about the Ninja Gaiden games was their soundtrack, which had always been top notch. Some of these BGMs are still recreated and reimagined to this date. But the difficulty had always been a huge issue with these games, and there are a lot of admirers of this particular series who definitely love to play these games, but fail to beat them.

Ninja Gaiden 4 is set to release soon
The series stopped after 1992, but in 2004 it reawakened for the original Xbox. One thing it kept positively from its previous counterparts is its image difficulty. Ninja Gaiden 2004 is often regarded as one of the hardest Xbox video games ever made.
Check out the other take on Ninja Gaiden 4 here
This reboot series is continuing to this date, and Ninja Gaiden 4 is finally coming for multiple platforms like PlayStation 5, Xbox Series X, and PC. From the trailer, it looks quite promising so far. Hopefully, it maintains its status as the "NES Hard."