Plutobi(the nickname of Pluto) was kicked out of the planet list in 2006 and became a dwarf planet, because he is so small and weak. So he decided to become Planet again by showing his power to other planets in the Solar System.
Absorb many asteroids and get stronger. And also defeat 60 planets, moons and mega asteroids to show his power.
PS4 release Date;
US ; April 4 2017
Europe : April 5 2017