Bandai Namco debuted the first gameplay of Piccolo in Dragon Ball Z: Kakarot during a Sony Interactive Entertainment Hong Kong stage event at Animation-Comic-Game Hong Kong 2019.
Piccolo is one of the three announced playable characters outside of main character Goku in addition to Vegeta and Gohan.
Dragon Ball Z: Kakarot is due out for PlayStation 4, Xbox One, and PC in early 2020.
Watch the footage below (from 16:08 to 25:41).
https://www.youtube.com/watch?v=ikcCJaXQuO8