Cascading Reels is a unique feature of slot machine games where, when a winning combination occurs, the symbols in the combination are removed. New symbols then fall from above to fill the vacated spaces, and this process of scoring and elimination repeats until no more winning combinations are formed. This is known as the cascading drop feature.
IGT – Davinci Diamond
This rule brings the feel of gem block elimination to slot machine gameplay, hoping to give players the expectation that they can keep eliminating as long as they are lucky. However, it is often very difficult to trigger multiple eliminations in succession, and achieving four consecutive eliminations might even be harder than entering a free game, thus it may not fully satisfy the players' desire for continuous elimination and might even lead to some disappointment.
Therefore, the following two evolutions were developed to improve this drawback:
The first evolution is + Progressive Wild
This added a feature where symbols transform into wilds during consecutive eliminations, increasing the chances of continuous elimination.
QuickSpin – Big Bad Wolf
This evolved gameplay not only increases the probability of consecutive eliminations but also gives players a clearer target and sense of achievement. Players aim to transform all symbols into wilds, and each transformation enhances the anticipation for the next spin. Once all are transformed, the excitement comes from hoping the eliminations continue uninterrupted, as this excitement can sometimes even surpass winning a big prize!
The second direction is evolving into Exploding Reels
During consecutive eliminations, not only are the connected symbols removed, but the connected reels are also respun, again to increase the chances of continuous elimination. Personally, I feel this isn't as good as the previous one, but the effects paired with the respin in the following game are still quite impressive.
Aristocrat – 3 Emperors | Yu™
In designing these types of games, it's important to pay attention not only to the usual factors but also to the rate of consecutive eliminations. Therefore, the hit rate should be higher, and the payout rate can be lower. If the visual and sound effects can be well matched during consecutive eliminations, it enhances the players' excitement and anticipation.
