A neon vault opens on three reels of cut gems. Diamond Prime plays as a classic 3×3 slot with five fixed paylines, then turns Bonus coins and Mystery Jackpot symbols into six Free Spins and four jackpots — topped by a Grand worth 1,000× the total bet.
Wilds appear in the main game only and complete line wins by standing in for every symbol except the Bonus and the Mystery Jackpot. A Bonus symbol pays 1, 2, 3, 4, 5, 7, or 10× the total bet immediately and never forms a payline. The Mystery Jackpot symbol stays off the lines as well. Once Free Spins start, it transforms into a Mini, Minor, Major, or Grand symbol, paying 15×, 30×, 100×, or 1,000× the total bet.
Free Spins begin when a Bonus symbol, a Mystery Jackpot symbol, or both land on all three reels. The round opens with 6 Free Spins. If those symbols land on only one or two reels, the Gold Stack can still trigger at random and add the symbols needed to start the feature. Shifting diamonds are visual only and do not change that chance.
During Free Spins, only Bonus and Mystery Jackpot symbols can land. Every Bonus prize is added to the total win as soon as it appears, and three or more Bonus and/or Mystery Jackpot symbols on a single free spin award one extra spin. Jackpot indicators fill as matching symbols land:
2 Mini Jackpot symbols: award the Mini Jackpot.
3 Minor Jackpot symbols: award the Minor Jackpot.
4 Major Jackpot symbols: award the Major Jackpot.
5 Grand Jackpot symbols: award the Grand Jackpot.
Extra symbols of the same type carry over toward the next jackpot. Any progress that has not paid resets when Free Spins end. Symbols carried into the round still count toward the total win and the indicators.
Step into the vault and take your shot at the Grand.
About Platipus Gaming
Platipus Gaming is a distinguished casino game development studio committed to creating captivating and high-performance slot games. With a rich portfolio of over 100 HTML5 titles, Platipus delivers immersive gaming experiences characterized by stunning graphics, innovative features, and sophisticated mathematical models. All Platipus games are meticulously certified for various regulated markets, ensuring compliance and fairness. The company prides itself on its mobile-first approach, guaranteeing optimal performance across all devices, and provides a suite of promotional tools designed to enhance player engagement and operator success. Platipus's commitment to quality and player satisfaction continues to drive its growth and reputation in the competitive global iGaming sector.