each character takes action according to their "agility" statistic. The participant has free movement in the battle area during their turn. Characters are allocated Active Points (AP) at the start of their turn with the number decreasing with each step and attack they make. There are three levels of attack with higher levels costing more AP but doing more damage. Attacks may be strung together into combination attacks. New weapons provide new attacks and Attack Skills can be found scattered throughout the game. A battle is won when all enemies are defeated or have fled, with victories earning the player experience points. Plot Humanity has fled the devastated surface to the underground where the upper classes inhabit higher levels with better air. Ryu is a low level citizen who rebels against the government to save the life of Nina, who cannot survive underground due to experimental surgery to convert her into an air purification machine. Ryu can transform into a dragon. Ryu's must ascend with Nina and the ever-watchful Lin from a kilometer below ground to the surface, traversing dark passageways and fending off encounters. On the lowest levels are those with low D-ratios; as one ascends the inhabitants' D-ratio increases. D-ratio determines social status. The highest D-ratio a human can achieve is 1/4 - this is the Dragon Quarter of the title, a one in four chance of linking with an available dragon. There are two subplots; the first concerns the six mysterious rulers of the underground world, ubiquitous in their ability to acquire and act on information. These rulers reveal a legend that a boy with the power to become a dragon will return the world to the surface. The second subplot is a rivalry between Ryu and Bosch, an entitled, monomaniacal elitist. Bosch initially uses Ryu as his lackey to increase his rank, but inadvertently releases Ryu's ability to become a dragon. Seeing this power, Bosch undergoes dragon fusion and gains the ability to also become a dragon. Ryu invades the upper levels. Three of the five regents which govern Ryu's world have fallen to his blade before he faces Elyon, aka "Origin", the leader of the Regeants and first host of the dragon Odjn. Elyon acknowledges none have come closer to reclaiming the surface world than Ryu. He summons two pieces of himself that he had he banished to extend his life. After a fierce battle