The control panel at the bottom of the screen is more refined, with labels for Bet Max, Auto Play, Spin, Win, Total Bet, Line Bet and Lines. You can choose to play on nine paylines, or just one, and you can set the autoplay mode to play up to 99 mechanized rotations.

As in the first game, the three key symbols in Highway Kings Pro are trucks. Once again, the red truck is Mack Daddy, paying 10 to 2, 50 to 3,500 to 4 and 10,000 for the highest prize of 5.