Its gameplay derives from roguelikes, with a more intuitive graphical interface and is an 'unofficial' sequel to Fatal Labyrinth.

Story:
As the player rides a bicycle one late afternoon, he turns down an alley never before noticed and enters an antique shop. There, a mysterious glowing crystal is sitting on a shelf. Upon approaching the crystal and gazing into it, a powerful force pulls the player in, causing a blackout.

The player awakens in a forest with a large egg following behind. This forest is a huge maze, crawling with dangerous creatures. The player finds weapons and other items scattered around with which to fight the monsters. The only way out is to continue onward, defeating monsters and growing in power along the way.

Gameplay:
The player starts off in the middle of a maze level covered by the fog of war. The first ten levels are a random mixture of trees and cacti, the next 10 are brick walls and the final ten are metal. (In the Game Gear version, the levels are a mix of trees, cacti, sunflowers, and Easter Island style statues.) Progress is achieved by completing each floor then warping to the next by walking the character to a differently coloured square, found by clearing the level.

Weapons, armour, potions, rings, food, money and enemies are randomly placed on the ground. If a player walks around for too long without picking up food, he will die of starvation. Cake objects give 11 to 27 and meat objects 42 to 46 food points and each food point allows the character to move six spaces on the screen and the maximum number of food points is 100.

The player has a number of Hit Points dependent on the level achieved, these increase by killing monsters and advancing to the next Character level. Hit Points are traded in battle with the enemy and recovered by moving around. Money is used to revive from death, increasing in cost with the number and severity of previous deaths.

You're caught in a fantastic world of unearthly beauty and deadly demons. You'll pass through thirty worlds in search of the Magic Goblet. There's no way out of the musical nightmare... until you find it.

"Dragon Crystal" is a dungeon crawler with RPG elements, along the lines of classics such as Fatal Labyrinth, Rogue and Nethack. Without relying on a story, the game throws you into a randomly generated world which you should explore carefully - and most importantly, where you must survive! The complex, maze-like levels reveal their structure only after you cover the corresponding map areas. Your goal in each level is to reach a teleporter which will take you to the next one. There are also a lot of random items scattered around - weapons, armor, money, and food. Money allows you to continue the game if you die, food prevents you from starving. The enemies are visible on screen, and you fight them in a fast-paced turn-based combat, moving around and pressing direction arrows to strike with the equipped weapon. You are always accompanied by an egg which will eventually grow up to be a dragon if you have leveled up enough.