Introducing Action Bank Wonder 500, a thrilling video slot featuring a 3x5 layout and 20 fixed win lines. Unveil wins through 3 to 5 matching 7, BAR, or X symbols on adjacent reels, starting from the leftmost reel. Watch out for the transforming O symbols that can turn into valuable VAULT symbols.

Attain 5 VAULT symbols across the reels to unlock a choice between FREE SPINS or the intriguing BIG BANK BONUS. During FREE SPINS, discover 3 double symbols on the first reel – double X, double bar, and double 7 – which double your line wins when matched with corresponding singular symbols on the remaining reels.

As the reels spin, keep an eye on O symbols shifting into VAULT symbols. Achieve 5 more VAULT symbols to trigger another round of FREE SPINS, adding to your excitement. And remember, any additional free spins earned during the bonus round are directly added to your remaining free spins count. Will you take the gamble or secure your winnings? The decision is yours to make.

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