Eye of the Beholder is the Retro Game of the Day for 23 April, 2016

From Wikipedia:

Eye of the Beholder is a role-playing video game for computers and video game consoles developed by Westwood Associates. It was published by Strategic Simulations, Inc. in January 1991 for the DOS operating system and later ported to the Amiga, the Sega CD, Game Boy Advance and the SNES. The Sega CD version features an exclusive soundtrack composed by Yuzo Koshiro. A port to the Atari Lynx handheld was developed by NuFX in 1993, but never officially released.

One of the greatest dungeon crawler RPGs ever, Eye of the Beholder featured tons of punishing levels with mind-boggling puzzles, traps, monsters, and well-hidden secrets. Absolutely one of my favorites of all time, it also made appearances on consoles and did really well, especially the Sega CD version with its excellent soundtrack.