In Mugen no Shinzou, players control a lone character with basic attributes, exploring a vast fantasy land filled with towns and dungeons. Navigation is achieved through scrolling with arrow keys, and the player character is not visually represented on the screen, which is a distinctive feature of the game.

The storyline of Mugen no Shinzou follows a protagonist cursed by the gods, who is transported to a realm threatened by goblins, orcs, and a mysterious dragon. To return home, the hero must seek out the powerful artifact known as the Heart of Phantasm.

Mugen no Shinzou stands out with its unique representation of dungeons through abstract pseudo-3D vector graphics and its simple turn-based combat system, which emphasizes strategic decision-making in encounters.