Pompeii offers a Volcano Wild that can land on reels 2 and 4. On reel 2, it carries a 3x multiplier. On reel 4, it comes with a 5x win multiplier. If you combine them, you get a 15x multiplier. The Free Games feature is triggered when three or more Scatters appear on the reels. Get up to 20 freebies at once. Also, there is the Gamble feature where you can boost your winnings.