Royal Hold Diamonds: Crystal Portal is a diamond and space-themed slot by BePlay.
The slot is built around an irregular reel setup and offers a theoretical maximum win of x1000x.
It also comes with special features such as Hold and Respin and Fixed Jackpot, adding locked-symbol bonus tension and extra jackpot targets alongside regular wins.
Reel Config
Irregular
Paylines
Etc.
RTP
96.1%
Volatility
-
Max Win
1,000x
Bonus Buy
40x
The feature structure places particular emphasis on separate prizes and bonus modes. Spin-related mechanics contribute to separate phases of play. Jackpot mechanics add a separate prize element to the game.
An extensive feature set brings together a wide range of special mechanics, giving the game more individual systems to explore alongside its core format.
Select a role to explore its contributing features.
Number of features contributing to each role. One feature can contribute to several roles.
Each bar counts the features that contribute to a functional role. One feature can contribute to more than one role. Bar lengths are scaled to the largest count within this game; compare the numbers when looking across games.
These counts describe feature composition. They are not win probabilities, payout contributions, or quality ratings.
Hold and Respin, or 'Hold & Win', is one of the most popular core bonus game mechanics in modern slots. The essence of this feature, unlike traditional free spins, is to 'Hold' bonus symbols on the reels and 'Respin' the remaining empty spaces to fill up the screen. This system was popularized worldwide through 'Money Train 2's' 'Money Cart Bonus' and is the foundation for numerous developer-specific brand features like Wazdan's 'Hold the Jackpot™' and Playtech's 'Fire Blaze™'.
A Mystery Symbol is a surprise feature where symbols appear on the reels with their identities hidden, and after the spin stops, all mystery symbols on the screen simultaneously transform into one single, identical symbol. The core of this feature is to provide players with dramatic tension and anticipation of "what symbol will it be?" until the moment the result is revealed, and the thrill of a reversal where, depending on the outcome, an ordinary spin can be turned into a moment of huge payouts.
Low Bonus Buy Price
This slot's bonus buy price is below the usual range for comparable slots. That makes buying the feature relatively accessible, especially if you want to try the free-spin round directly. Keep in mind that some games offer multiple free-spin tiers, and SlotWise uses the lowest available buy price as the reference. A lower price may also mean that the free-spin feature itself carries a lighter payout profile than higher-priced games.
Each SlotWise Preview examines a game’s rules, specifications, and special features. We identify individual mechanics and map them to standardized feature categories, then use FeatureMatch™ to describe the game’s mechanical character. Alongside free demo access, this gives you a consistent starting point for understanding and comparing games. Where a 300SPINS™ review is available, it adds observations and results from a recorded play session.
