Behind Bars: Masterplan is a prison escape-themed slot by Bullshark Games.
It features a 5x4 reel configuration with Cluster Pays, where winning symbols disappear and new ones cascade down to fill their places.
Offering a maximum win of 12,000x, the game boasts high win potential with persistent multipliers and a Hold and Respin-style bonus game.
Reel Config
5x4
Paylines
Cluster
RTP
96.25%
Volatility
-
Max Win
12,000x
Bonus Buy
100x
Two roles are especially well represented here: reward enhancement and persistence and growth. The payout-related family contributes to increases in reward values. Spin-related mechanics include a state that persists or develops as play proceeds.
The core format is accompanied by a substantial collection of special mechanics, making this an extensive feature structure.
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™'.
An Accumulating Multiplier is a powerful system, primarily used in bonus rounds like free spins. The core of this feature is that the multiplier applied to winnings does not reset with each spin; instead, it is maintained or continuously increases until the bonus round ends. Its goal is to create anticipation for exponentially larger payouts as the round progresses, providing players with maximum tension and thrill.
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.
