Tower of Druaga
Platform: MSX
Region: Japan
Media: Cartridge
Controller: Keyboard, Joystick
Genre: Maze > Adventure 
Gametype: Undefined
Release Year: 1986
Developer: Namco
Publisher: Namco
Players: 1
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You control a heroic knight, who is actually prince Gilgamesh, who must attempt to rescue the maiden from the demon Druaga. You are armed with a sword and shield to attack and defend. You move from floor to floor, which are constructed as mazes, searching for the key, this key will unlock the stage exit. Items can be found by killing (all) enemies.

http://www.mobygames.com/game/msx/tower-of-druaga