The Immortal

The Immortal is an isometric adventure game originally created for the Apple IIgs, which was ported to the Amiga, Atari ST, MS DOS based PCs, NES, and Mega Drive/Genesis. The main plot revolves around a wizard attempting to find his mentor in a large and dangerous labyrinth. The game is known for its high degree of graphic violence (much reduced in the NES version) along with its punishing difficulty. Source: Wikipedia, "The Immortal (video game)", available under the CC-BY-SA License.