Winaday.com has added another "one of a kind" game to its portfolio of 3D slot machines.

Gold Boom is a nine-wheel, six-pay line slot machine that offers free bonus spins, a progressive jackpot and high payouts.

Players have the chance to win bonus spins that, according to the company, can pay off big. Every time three diamond symbols appear on a wagered pay line, one diamond is added to the bonus spin counter.

When three bonus spin diamonds have been collected, the player wins three bonus spins.

The amount won on those spins is based on the amount bet on the last normal spin, so strategic players will want to keep an eye on the bonus spin counter when deciding on their wagers.