Makai Prince Dorabocchan, released for the NEC PC-FX, is likely an action-adventure title. The name implies a fantasy setting with a playful, perhaps whimsical, tone.  Gameplay could involve exploration, puzzle-solving, and possibly character interaction, though concrete information is limited.  It's possible this is another adaptation of an existing anime or manga. The developer of this game is not readily apparent.

Makai Prince Dorabocchan (Japan)

Mahjong Haou Den - Kaiser's Quest (Japan)

Mahjong Shikyaku Retsuden - Mahjong Wars (Japan)

Maison Ikkoku (Japan)

Maison Ikkoku (Japan) [En by Dave Shadoff+Filler v1.01]

Majin Eiyuu Den Wataru (Japan)

Makyou Densetsu (Japan)

Maniac Puroresu - Asu heno Tatakai (Japan)

Mesopotamia (Japan)

Metal Stoker (Japan)

Military Madness (USA)

Mizubaku Dai Bouken (Japan)

Momotarou Densetsu Gaiden Dai 1 Shuu (Japan)