In Ristar, we follow the story of a far away solar system, Valdi, that was corrupted by an evil tyrant called Greedy. Greedy forced the leaders of each of the seven planets the system is composed of to work for him, enslaved the people and kidnapped Ristar's father. Desperate, they make a plea for help. It is answered by Ristar, a tiny humanoid yellow star with long, elastic arms. To free the population and liberate his father, Ristar must fight Greedy's minions throughout every planet, restore the leaders and eventually fight Greedy himself.