Instructions
Start the game in any mode and choose your team.
When one of your players has the ball, move toward the goal using the left thumbstick on your controller.
Press the right trigger on your controller to move faster toward the goal. Make sure to gain some speed when performing a dunk move.
Press "up" on the right thumbstick and you will perform a normal dunk. Press "down" on the right thumbstick to perform a reverse dunk.
Press "left" on the right thumbstick to perform a fancy dunk move and press "right" on the right thumbstick to perform a power dunk.