Slot games of today often have what is known as a "gamble" feature. Not all, but some slots machines come with the gamble feature, so players can make a bet after a spin and either multiply their wins or lose.
If the player guesses correctly which the next card will be, either red or black, they can double wins. Guess correctly the next card suit and quadruple wins. Players can continue to bet up to the bet payout limit see rules that apply on the paytable. If a player loses the bet, they will lose any wins collected from the previous spin. When games are made up of a large jackpot, quadrupling, tripling, and even doubling spin wins can really result in big wins.
Wins grow exponentially as well with other added special features like with wilds, scatters, free spins, multipliers, and bonus rounds. A gamble feature is like the icing on the cake for a slot machine for many people. Play them all here for either fun or for real money.
Video slot machines with Gamble feature are the real fun. One such super popular online slot machine with Gamble feature is the "Book of Ra Deluxe" slot game, one in Novomatic Deluxe slots, which also come with Gamble feature.