Instructions
Gain possession of the ball and position yourself outside of the paint, as far back as the three point line. Prepare to juke or spin off your defender in order to drive to the hoop.
Drive toward the hoop while holding "Turbo," which is the "R2" button by default. The type of dunk you attempt will depend on the angle from which you approach the hoop.
Press the Right Analog Stick in either of the four cardinal directions while driving to the hoop and holding "Turbo." Performing a quick, 360-degree motion with the Right Analog Stick executes the 360 dunk for certain players.