Like the previous installments, this game involves the raising, breeding, and fighting of monsters.

Players must go to the Shrine, where they can choose their preferred method to generate a monster.

Once a player regenerates a monster, they can raise it on a ranch, and train it to compete in battles.

The story centers around Phayne, who is offered a job working on a ranch, and the mysterious girl Rio, who has the abnormal ability to talk to monsters.

Rio eventually works alongside Phayne on the ranch, and once a mysterious man by the name of Mr. K appears at their doorstep, the real plot begins to unfold.