Happy Diamond is a fruit and gem-themed slot by Octavian Gaming.
It features a 5x4 reel configuration with 1024 ways to win, including Wild and Scatter symbols.
Players can win a fixed jackpot of up to 5000x in the Lock'n'Roll feature, and during Free Spins, a multiplier increases with each non-winning spin, triggering a respin.
Reel Config
5x4
Paylines
1,024 Ways
RTP
93.131%
Volatility
-
Max Win
5,000x
Bonus Buy
100x
The feature structure places particular emphasis on separate prizes and bonus modes. A jackpot-based prize route forms part of the reward structure. Bonus access is one of the roles covered by scatter mechanics here.
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™'.
Reel Expansion is a feature where the physical size of the game grid (reels or rows) actually gets bigger, typically upon entering a bonus round like free spins. This goes beyond simply adding a multiplier; it aims to expand the 'board' of the game itself, providing players with a wider field of opportunity and fundamentally increasing the number of winning ways.
Average Bonus Buy Price
This slot's bonus buy price sits within the usual range for comparable slots. Buying the feature can be a reasonable option if your goal is to reach the free-spin round without waiting for a natural trigger. The trade-off is that you skip the base-game spins that would normally happen before the feature, including any wins or volatility from that part of play.
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.
