Knockout Riches makes reel height part of its identity. Reels one and five can show one to three rows, while the three middle reels have four to twenty rows. Against that variable frame, winning symbols collected in the Stacked Symbols Feature can be used to stack still more symbols. Two Scatters trigger five Free Spins. The official summary confirms these pieces but does not say how collected symbols are selected, how stacking changes the board, or what persists during the bonus. The result is a slot whose central idea is accumulation, but the exact rules of that accumulation require care: the catalog gives the feature headline, not a complete sequence or guarantee that collected symbols will form wins.
Knockout Riches at a glance
| Provider | PG Soft |
|---|---|
| Genre / theme | Sports |
| Game type | Video slot |
| Reels / grid | 5 reels; reels 1 and 5 have 1–3 rows, reels 2–4 have 4–20 rows. |
| Reference RTP | 96.75% |
| Volatility | 3 (official catalog value) |
| Maximum win | 10,000× bet |
| Release date | 28 April 2025 |
| Main features | Winning symbols can be collected to stack more symbols in the Stacked Symbols Feature; 2 Scatters trigger 5 Free Spins. |
RTP and stake limits can vary by version and market. Check the information screen in the game you open. Maximum win is a ceiling, not an expected result.
A reel layout with different heights
The official listing describes five reels. Reels one and five display between one and three rows, while reels two, three and four range from four to twenty rows. This is an unusually variable layout; a single fixed grid size would obscure the stated difference between the outside reels and the central block. The summary does not explain whether heights change from spin to spin, how the range is chosen, or what win evaluation applies across the unequal reel windows. It also provides no payline count or standard symbol table.
Stacked symbols are the other base mechanic. During the Stacked Symbols Feature, winning symbols are collected to stack even more symbols. The catalog links the collection to symbols that have won, but does not clarify whether the exact symbol type or each instance is stored, how many are needed, where the added stacks appear, or whether there is a maximum. These details determine the practical value of collecting symbols. A clear point is that the feature increases stacking based on winning symbols; it is not safe to claim that every win grows a stack or that every added symbol lands in a useful position.
The five-spin Scatter feature
Two Scatter symbols appearing on the reels trigger five Free Spins. This establishes both a threshold and an initial award. The published summary does not state whether Scatter locations matter, whether additional Scatters change the number of spins, or whether the feature can retrigger. It also does not say whether the variable reel heights or Stacked Symbols Feature continue during Free Spins. Those are not minor distinctions: they would explain whether the bonus inherits the base game’s collection behavior or operates as a separate mode.
The changing row counts and stacking feature could, in principle, affect the number of visible symbol positions, but the catalog does not specify a causal link between reel height and winning-symbol collection. It is useful to keep these mechanics adjacent in the review because both shape the board, while not presenting them as one proven sequence. The official description does not give a multiplier, expanding Wild or other bonus effect, so none is added here. Players should use the in-game help for the detailed transition between the feature and the five awarded spins.
Official configuration
The standard catalog entry lists maximum RTP of 96.75%, volatility value 3 and maximum win of 10,000 times the bet. An operator may use a different RTP setting. The numeric volatility scale is not explained by the source record and is therefore reported as a value, not translated into a category. Release date is April 28, 2025. The 10,000x maximum is a ceiling, not an indication of how often stacked symbols collect or how the variable reel heights affect a result. The source provides no trigger probabilities, stack cap or payline count.
Strengths and weak points
Strengths
The layout’s changing reel heights give the board a clear visual structure, while winning-symbol collection provides a distinct stated reason for additional stacks.
Weaknesses
The rules omit height selection, stacking limits, symbol placement and Free Spins interaction, so the catalog cannot show how accumulation affects actual win evaluation.
Our Editor’s View
Knockout Riches offers two concrete structural ideas: unequal, variable reel heights and a feature that collects winning symbols to build more stacks. Two Scatters then start five Free Spins. The pieces all change what can appear on the screen, but the catalog does not explain their interaction or the exact collection process. That makes the premise easy to describe and harder to evaluate in detail. Readers who enjoy irregular grids and symbol accumulation may find the format appealing, especially if they like watching the central reels carry more rows than the edges. Those who want to compare bonus strength should confirm whether stacking continues in Free Spins, how symbols are selected, and whether reel heights vary each round. The headline maximum does not answer those questions.
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