Hagane: The Final Conflict is a side-scrolling platform game developed by Keita Amemiya.
The Fuma and Koma ninja clans who live mainly in darkness have mastered the secret arts of ninjutsu and black magic. Although they look just like normal people, they have strength and spiritual power beyond normal human beings. Each clan consists of several factions. The Fuma clan is split into factions based on the Chinese zodiac. The Koma clan is split into factions by color; consisting of the white, the gold and the red dragon. In the case of the Fuma clan, members of a given faction know nothing more about any other factions except that they exist and their blood lines are cut off from the outside world and are destined to decline. The Fuma clan possesses extreme strength and spiritual power. Their duty is to protect the Holy Grail, which is said to possess power that can destroy the world. From long ago, the evil Koma clan had plotted to destroy the world using the destructive power of Holy Grail. Eventually, they attacked a faction of the Fuma clan and stole Holy Grail. However, they failed to notice that among the severely wounded, one man survived... On the verge of death, the barely living man known as Hagane was brought back to life by advanced cyber-technology performed by a mysterious old man named Momochi. However, none of Hagane's body survived except his brain. Already a powerful ninja, he now had the incredible power and speed of a human cyborg. With this power, he vowed to take revenge on the Koma faction.
he game is a side-scroller, similar to the early Ninja Gaiden games. The game is noted for being very difficult and there is no save feature.
Source: Wikipedia, "Hagane: The Final Conflict", available under the CC-BY-SA License.