Bonus only is a simple 3 reel slot with 3 lines paying left to right. There are no symbol payouts on the reels. Each win line can trigger its own feature by getting 3 or more bonus symbols on a win line; Vegas, Macao and Monte Carlo.
Three matching bonus symbols on a win line will award the player 2 rolls on that given bonus. If you get a Golden Dice symbol on reel 3 with 2 matching bonus symbols then the player is awarded 4 rolls.
Each bonus consists of a trail/board with 40 sections themed up with the city, the bonus payouts are smallest for Vegas and largest for Monte Carlo. The player will need to roll the dice to move around the board. Depending on where they land will determine the prize, either a multiplier, no win, extra roll or move back or forwards around the board. Rolling a double will award the player an additional roll. If the player goes around the board, all payouts are increased by the highest amount on the board. The bonus stop when the player has no more rolls.