Cascading reels is the single most important mechanic to understand in modern UK slots. It’s present in Megaways games, cluster pays games, and plenty of traditional payline slots. It’s the reason Gonzo’s Quest multipliers exist, why Jammin’ Jars Wild Jars grow in value, and why a 26,000x win on Bonanza is mathematically achievable from a 1x stake.
It also goes by about six different names depending on which developer built the game — and most players don’t realise they’re all the same thing.
This guide covers everything: the mechanic itself, why the paytables look low and why that’s not actually a problem, how multipliers interact with cascades in different implementations, and which games are worth playing specifically because of how they use cascading.
The Terminology — It’s All the Same Thing
Before anything else: the following terms all describe the same core mechanic. Developers rename it to fit their brand or game theme.
| Term | Used by | Means the same as |
|---|---|---|
| Cascading Reels | Generic / industry term | All of the below |
| Avalanche | NetEnt (Gonzo’s Quest) | Cascading Reels |
| Tumble | Pragmatic Play (Gates of Olympus, Sweet Bonanza) | Cascading Reels |
| Reactions | Big Time Gaming (Bonanza Megaways) | Cascading Reels |
| Cascade | Push Gaming (Jammin’ Jars) | Cascading Reels |
| Swooping Reels | Some Blueprint titles | Cascading Reels |
| Rolling Reels | Some Microgaming titles | Cascading Reels |
When you see any of these terms on a game description, you’re looking at the same fundamental mechanic. The name is branding; the function is identical.
How Cascading Reels Work — Step by Step
Traditional slots: you spin, symbols land, wins are paid, all symbols reset. One outcome per spin.
Cascading reels changes step four. Instead of all symbols resetting:
- You spin. Symbols land on the reels.
- Any winning combinations are identified and paid.
- The winning symbols are removed from the grid.
- Symbols above the removed positions fall downward to fill the gaps (this is the “cascade” or “avalanche”).
- New symbols drop in from above to fill any remaining empty positions at the top.
- The game checks for new winning combinations in the repositioned layout.
- If new wins exist, they’re paid — and steps 3–6 repeat.
- This continues until a spin produces no new winning combinations. Only then does the spin end.
The critical implication: a single paid spin can produce multiple wins. You stake once and receive payouts for every winning combination in the cascade chain — 2, 5, 10, or theoretically unlimited consecutive wins — all from one button press.
Why Cascading Paytables Look Low — and Why That’s Fine
Open any cascading slot’s paytable and the individual symbol values look modest compared to traditional payline games. A top symbol paying 5x stake for five of a kind seems underwhelming next to a non-cascading game where the same match might pay 50x.
This is intentional and mathematically honest — not a trick.
In a traditional payline slot, one spin = one set of wins. The paytable must deliver complete value from that single outcome. In a cascading slot, one spin can deliver 10+ consecutive wins. If the paytable were equivalently generous, a 10-cascade sequence would produce 10× the win of the already-generous amount — creating unsustainable maths for the operator.
Cascading game developers reduce individual symbol pay values to compensate for the win-multiplication potential of the mechanic. The RTP is maintained at a consistent percentage — you’re not being shortchanged. The value is distributed differently: less from any single win, more from chain sequences.
Practical takeaway: when reading a cascading game’s paytable, don’t compare it to traditional payline payouts. Compare it to other cascading games. And look at the multiplier structure — that’s where the actual big-win potential lives.
Cascade Multipliers — The Three Main Types
Most modern cascading slots attach multipliers to their cascade sequences. This is where the max win potential actually comes from — not the base paytable. There are three main implementations:
Type 1: Incremental Multiplier (Builds Through Cascades)
The multiplier starts at 1x and increases by a fixed amount with each successful cascade. Most common in Megaways and traditional reel cascading slots.
Example — Gonzo’s Quest (NetEnt):
| Cascade number | Base game multiplier | Free spins multiplier |
|---|---|---|
| 1st cascade (initial win) | 1x | 3x |
| 2nd cascade | 2x | 6x |
| 3rd cascade | 3x | 9x |
| 4th cascade onwards | 5x | 15x |
The multiplier resets to 1x (base game) or 3x (free spins) at the start of each new spin. During a cascade chain, the third win in the sequence pays at 3x the paytable value; by the fourth, 5x. In free spins, that fourth cascade pays at 15x. A modest win late in a cascade chain becomes significantly more valuable than the same win at the start.
Example — Bonanza Megaways (BTG): The free spins multiplier starts at 1x and increments by +1x for every cascade, with no cap and no reset between spins (only resets at the end of the free spins round). This is the mechanic that makes 26,000x wins mathematically possible — a cascade chain of 20+ with a 20x multiplier running produces huge payouts from modest cluster wins.
Type 2: Sticky Wild Multiplier (Symbol-Attached)
Instead of a global multiplier applying to all wins, individual Wild symbols carry their own multipliers that grow each time the Wild contributes to a win.
Example — Jammin’ Jars (Push Gaming): Each Wild Jar starts at 1x. Every time the Jar is part of a winning cluster, its multiplier increases by 1x for the next cascade. Two Jars with different multipliers in the same cluster multiply together (not add). See our Jammin’ Jars review for the full breakdown of how this creates 20,000x potential.
Example — Yggdrasil’s DoubleMax games (Raptor DoubleMax, etc.): Each Wild doubles the current multiplier rather than adding 1x. One Wild = 2x. Two Wilds = 4x. Three = 8x. Uncapped. The compounding is exponential rather than linear — far more aggressive than Gonzo’s sequential progression.
Type 3: Multiplier Symbols on the Grid
Random multiplier values appear as symbols on the reels. When a winning cluster connects to a multiplier symbol, that multiplier applies to the win. Multiple multipliers in the same cluster combine.
Example — Sweet Bonanza / Gates of Olympus (Pragmatic Play): Bomb multiplier symbols (2x through 100x) appear randomly on the grid. Any cluster win that touches a multiplier symbol has that multiplier applied. Multiple multiplier symbols touching a cluster multiply together — a 5x bomb and a 10x bomb both adjacent to a winning cluster produce a 50x multiplier on that specific win.
This type creates the most variance of the three — when high multipliers land adjacent to large clusters, the outcomes can be extraordinary. When they don’t, individual wins are modest.
How Cascading Interacts With Different Grid Types
Cascading reels behaves slightly differently depending on the grid format it’s combined with. This matters for understanding session behaviour.
Cascading on Traditional Paylines (e.g. Gonzo’s Quest)
A 5×3 grid, symbols fall from top to bottom. Wins require matching symbols on fixed paylines from left to right. After a cascade, the repositioned symbols create new payline opportunities but within the same fixed line structure. The cascade chain continues until no paylines produce a win. This is the most straightforward cascading implementation.
Cascading on Megaways (e.g. Bonanza, Eye of Horus Megaways)
Variable reel heights change with every spin, and cascading further changes them mid-spin. Symbols falling after a cascade fill the variable height positions — so the ways-to-win count changes both spin-to-spin and cascade-to-cascade. A 6-reel Megaways grid at maximum (117,649 ways) can have a cascade produce lower ways-to-win if the remaining symbols don’t fill all heights, or higher ways if falling symbols happen to complete full columns. This creates win-from-win sequences where each cascade potentially operates on a different number of ways to win. See our Top Megaways Slots Ranked guide for how this plays out in specific games.
Cascading on Cluster Pays (e.g. Jammin’ Jars, Sweet Bonanza)
No paylines — wins form from clusters of matching symbols touching horizontally or vertically. Cascading removes the winning cluster and new symbols fill from above. Because wins are spatial (any cluster anywhere on the grid) rather than linear (must match a specific payline), cascading in cluster pays games creates different visual dynamics — the entire 7×7 or 8×8 grid is the potential win space after every cascade drop. Multiple separate clusters can form simultaneously in different grid regions from a single cascade, all paying independently.
For an explanation of how cluster pays compares to payline slots structurally, see our Paylines Explained guide.
The Volatility Effect of Cascading
Cascading reels inherently increases volatility relative to equivalent non-cascading games with the same RTP. Here’s why:
Without cascading: wins are distributed more evenly across spins. Each spin independently produces a small win or nothing.
With cascading: most spins produce a single win or nothing. But a small number of spins produce cascade chains delivering 5–20× the value of a single win. The same RTP is delivered through more concentrated, less frequent but larger events.
This has practical bankroll implications:
- Sessions feel different — longer dry stretches between notable events
- When cascades chain effectively, a single spin can recover many prior losses
- Standard volatility guidance applies (higher volatility = larger session bankroll needed), but the cascade mechanic means you need patience for the sequences rather than just individual wins
Cascading multiplier games (particularly Megaways with unlimited cascade multipliers) are among the highest-volatility slots available. Bonanza’s free spins with unlimited Reactions multiplier and Raptor DoubleMax’s exponential Wild doubling represent the extreme end — sessions where nothing significant happens for 200 spins are routine, but a triggered feature with a running multiplier can produce thousands of times your stake.
Best Cascading Slot Games by Type — 2026
Best Traditional Reel Cascading: Gonzo’s Quest (NetEnt)
| Stat | Detail |
|---|---|
| RTP | 96.0% (up to 96.5% at some casinos) |
| Multiplier type | Incremental — 1x/2x/3x/5x base; 3x/6x/9x/15x free spins |
| Max Win | 2,500x stake |
| Volatility | Medium-High |
The game that popularised cascading reels in 2011. The free spins multiplier progression (3x, 6x, 9x, 15x by the fourth cascade) remains one of the most elegant implementations of the mechanic. The Inca civilisation aesthetic and Gonzo the explorer character have aged better than almost any slot from that era. Lower max win than modern cascading games, but the 15x multiplier cap in free spins makes the feature consistently valuable rather than requiring extraordinary variance events.
Best Megaways Cascading: Bonanza Megaways (Big Time Gaming)
| Stat | Detail |
|---|---|
| RTP | 96.0% |
| Multiplier type | Unlimited incremental in free spins (+1x per Reaction, no cap, no reset between spins) |
| Max Win | 26,000x stake |
| Volatility | Very High |
The game that defined the Megaways genre and still the best implementation of unlimited cascade multipliers. The “Reactions” branding for cascades, the top reel bar for GOLD letters triggering free spins, the unlimited multiplier that builds across the entire free spins round — all of it works together into a cohesive design that countless imitators have borrowed from without matching. Budget 100× your stake minimum for a session.
Best Cluster Pays Cascading: Jammin’ Jars (Push Gaming)
| Stat | Detail |
|---|---|
| RTP | 96.83% (variable — check per casino) |
| Multiplier type | Sticky Wild symbol multiplier — individual Jar multipliers combine multiplicatively |
| Max Win | 20,000x stake |
| Volatility | High |
The best UK example of sticky Wild multipliers combined with cluster cascades. The Jam Jar multiplier system — where each Wild accumulates its own multiplier independently and combinations multiply together rather than add — creates the most mechanically interesting cascade implementation in mainstream UK slots. Full mechanics in our Jammin’ Jars Slot Review.
Best Grid Cascading: Gates of Olympus (Pragmatic Play)
| Stat | Detail |
|---|---|
| RTP | 96.5% |
| Multiplier type | Random grid multiplier symbols (2x–500x) combine with cluster wins |
| Max Win | 5,000x stake |
| Volatility | High |
Pragmatic Play’s most successful cluster pays cascading game. The Tumble mechanic removes winning symbols, the 6×5 grid refills, and random multiplier symbols land alongside regular symbols. When a cascade chain produces a large cluster adjacent to multiple high-value multiplier bombs, the mathematical outcome can be dramatic. The Zeus mythology theme and premium visual quality make sessions visually engaging throughout dry spells.
Best Medium-Volatility Cascading: Gonzo’s Quest Megaways (Red Tiger)
| Stat | Detail |
|---|---|
| RTP | 96.0% (up to 96.5%) |
| Multiplier type | Incremental up to 15x in free spins, same as original |
| Max Win | 21,000x stake |
| Volatility | High (higher than original) |
Combines the Gonzo’s Quest multiplier progression with Megaways variable ways-to-win and cascading reels. The multiplier cap is the same as the original (15x in free spins), but the up-to-117,649 ways mean a 15x multiplier applies to a much larger potential win basis. For players who know and love Gonzo’s Quest but want higher win potential, this is the natural upgrade.
Cascading Reels vs Traditional Reels — Which Is Better?
Neither is objectively better. They’re built for different player preferences.
| Cascading Reels | Traditional (Fixed) Reels | |
|---|---|---|
| Session rhythm | Long periods without significant wins; occasional cascade chains delivering large totals | More regular individual wins; smoother balance progression |
| Individual symbol payouts | Lower per symbol hit | Higher per symbol hit |
| Win ceiling | Higher — chain reactions can produce very large totals from one spin | Lower — capped by paytable values and multiplier structure |
| Bankroll requirement | Higher — more variance, longer dry spells | Lower — wins arrive more predictably |
| Ideal for | Players wanting high max win potential and engagement through chain reaction dynamics | Players preferring steady, predictable sessions with clear win frequency |
Rainbow Riches is an example of a traditional (non-cascading) slot with a 27% hit rate and consistent small wins. Bonanza is a cascading Megaways game where 100-spin dry stretches are normal but the feature ceiling is 26,000x. They have similar RTPs (95% vs 96%) but completely different session experiences. Choosing between them isn’t about which is “better” — it’s about which experience suits your bankroll and playing style.
Common Myths About Cascading Reels
Myth 1: “Multiple wins from one spin mean better odds”
No. The RTP is fixed regardless of the mechanic. Cascading reels redistributes when and how wins occur — it doesn’t improve the mathematical return. The house edge is identical to a non-cascading game with the same RTP. What changes is the distribution: fewer wins overall, but more wins per spin when a cascade chain occurs.
Myth 2: “After a long cascade chain, the game goes cold”
No. Each spin is determined by the RNG independently. The game has no memory of previous cascade sequences. A game that just produced a 20-cascade chain has identical spin probabilities to one that’s produced no cascades in the last 200 spins. This is documented in how slot RNG technology works.
Myth 3: “Cascading slots have higher RTP because you get multiple wins”
Not inherently. The RTP is a developer setting embedded in the game’s mathematics — it’s the same whether the game cascades or not. Gonzo’s Quest at 96% and a non-cascading slot at 96% return the same mathematical percentage over millions of spins. The cascade mechanic determines how that 96% is distributed, not how much it is.
Myth 4: “You need to understand cascading to win”
Understanding cascading won’t change outcomes — those are RNG-determined. What understanding the mechanic does do is help you choose games that match your bankroll and risk tolerance, interpret paytables accurately (low individual values are normal and expected), and set appropriate session budgets (cascading games need larger bankrolls to sustain the volatility properly).
Frequently Asked Questions — Cascading Reels
What are cascading reels in slots?
Cascading reels (also called tumbling reels, avalanche reels, or reactions) is a slot mechanic where winning symbols are removed from the grid after paying, with remaining symbols falling down to fill the gaps and new symbols dropping in from above. If new winning combinations form from the repositioned symbols, those also pay and trigger another cascade. This continues until no new wins occur. The result is that a single spin can produce multiple wins in a chain sequence, all from one stake.
What is the difference between cascading reels and avalanche reels?
None — they’re the same mechanic with different names. NetEnt called it “Avalanche” in Gonzo’s Quest (2011); others use Tumble (Pragmatic Play), Reactions (Big Time Gaming), Cascade (Push Gaming), Rolling Reels (some Microgaming titles), or Swooping Reels (some Blueprint titles). The core function is identical: winning symbols disappear, remaining symbols fall, new symbols fill from above, new wins pay and trigger further cascades.
Do cascading reels improve your chances of winning?
Not in terms of RTP — that’s a fixed mathematical percentage set by the developer. Cascading reels don’t increase or decrease the overall return percentage. What they do is change the distribution of wins: fewer individual wins per spin, but those wins chain together when they occur. The casino’s mathematical edge (house edge) is the same whether you’re playing a cascading or non-cascading game with the same RTP.
Why do cascading slot paytables look small?
Cascading games intentionally have lower individual symbol values than traditional payline games. This compensates for the mechanic’s ability to produce multiple wins from one spin. If a cascading game had the same symbol values as a traditional slot, a 10-cascade chain would produce 10× the value of what’s already a generous payout — which is mathematically unsustainable. The lower individual values + chaining potential = the same overall RTP as a traditional game, just delivered differently.
Which cascading slots have the best multipliers?
For uncapped incremental multipliers: Bonanza Megaways (BTG) — free spins multiplier adds +1x per cascade with no ceiling across the entire feature. For exponential Wild multipliers: Raptor DoubleMax (Yggdrasil) — each Wild doubles the running multiplier (2x, 4x, 8x, 16x, uncapped). For sticky Wild multipliers: Jammin’ Jars (Push Gaming) — individual Wild Jar multipliers accumulate and combine multiplicatively. For random grid multipliers: Gates of Olympus (Pragmatic Play) — multiplier bomb symbols up to 500x on the grid.
Are cascading slots higher volatility?
Generally yes, compared to equivalent non-cascading games. The mechanic concentrates wins into occasional cascade chains rather than distributing them across regular individual wins. This means more spins with nothing significant, and larger events when cascades chain productively. Cascading Megaways games with unlimited multipliers (Bonanza, Extra Chilli) represent the high end of volatility in UK online slots — budget 80–100× your stake minimum for a session.
What is the best cascading reels slot in the UK?
Depends what you want. For max win potential and the original Megaways cascade implementation: Bonanza Megaways (26,000x, unlimited free spins multiplier). For highest RTP cascading game: Blood Suckers Megaways (97.66% RTP). For cluster pays cascading: Jammin’ Jars (96.83% RTP, 20,000x max win, sticky Wild multipliers). For medium-volatility accessible play: Gonzo’s Quest (96%, 15x free spins multiplier cap, manageable bankroll). Our full ranked list is at Top Megaways Slots Ranked.
How does cascading work in Megaways slots specifically?
In Megaways slots, variable reel heights change on every spin — typically between 2 and 7 symbols per reel, creating up to 117,649 ways to win. When cascading removes winning symbols, the remaining symbols fall into the variable-height positions. New symbols fill from above. Because the ways-to-win calculation depends on how many symbols occupy each reel position, the cascade can change the number of ways to win mid-spin as symbols settle into new heights. The cascade mechanic in Megaways games interacts with both the variable ways system and (in most implementations) a building multiplier, creating compounding win potential that increases with each consecutive cascade in a chain.
Can I control when cascades happen?
No. Cascades are triggered automatically when a winning combination lands. The RNG determines every outcome — whether a cascade chain occurs and how long it runs. No betting strategy, timing adjustment, or gameplay decision affects cascade frequency. What you can control is which cascading game you play (and therefore which multiplier implementation you’re exposed to) and your stake size (which determines the absolute value of cascade chain wins).
