Cubes Slot Review & Free Demo

Cubes Slot Review & Free Demo

Last Updated: May 2026 | Reviewed by Anastasia Nowak

Cubes is the foundational Hacksaw Gaming cluster pays title released in 2021, built on a 7x7 grid with 49 symbol positions, gravity-drop cascade mechanics, chain reactions, and Multiplier Cubes that add stacking multipliers to winning clusters. The 96.19% RTP and high volatility combination made Cubes a landmark title for Hacksaw when it launched, establishing the studio’s cluster pays approach that influenced their entire subsequent catalog. Symbols fall from above after each winning cluster is removed, gaps fill, and new clusters can form, potentially chaining multiple wins from a single spin. Wild Cubes substitute for all symbols in cluster wins, and Multiplier Cubes add 1x-5x to clusters they are adjacent to during chain reactions. Try the free demo at Flush with no registration required, or play for real using BTC, ETH, USDT, TRX, or SOL. The Bonus Buy feature lets you access the free spins phase directly. The 7x7 grid is significantly larger than standard slot grids, and the chain reaction potential during free spins, when Multiplier Cubes accumulate rather than reset, creates the pathway to the 10,000x maximum win at Flush.

Quick Stats

Stat	Detail
RTP	96.19%
Volatility	High
Max Win	10,000x
Ways/Lines	Cluster pays
Min Bet	€0.10
Max Bet	€100
Provider	Hacksaw Gaming
Release	2021

How Cubes Works

Cubes runs on a 7x7 grid of 49 symbol positions. This is the largest grid among the fifteen games in this guide and significantly larger than standard slots. The extra grid space is what makes cluster pays viable at high win potential: with 49 positions, clusters of 5+ matching symbols form naturally, and large clusters of 15-20 symbols are plausible during favorable drops.

The symbol set is deliberately simple: colored cubes in five color variants representing different value tiers. The visual design is minimalist, which was intentional at release to focus attention on the mechanical cascade action rather than thematic distractions. High-value cubes are the rarer colors, low-value cubes are common.

The gravity-drop mechanic is the foundation of Cubes’ chain reaction system. When a winning cluster is identified (5+ connected matching cubes), those cubes disappear. All cubes above the removed positions fall downward by gravity to fill the gaps. New cubes fall from the top of the grid to fill any remaining empty positions at the top rows. If the newly fallen cubes form new connections with remaining cubes, another winning cluster forms and pays. This chain continues until no new winning clusters form after a drop.

Chain reactions are the high-win events in Cubes. A single initial spin can produce a chain of 5, 8, or even 10 sequential cluster wins if the cube distribution cooperates. Each cluster in the chain pays separately, and chain reactions during free spins with active Multiplier Cubes are the pathway to the highest wins.

Wild Cubes appear on the grid as special cube symbols that substitute for any cube color in cluster formation. A Wild Cube in the middle of a mixed-color group can complete clusters that would otherwise be two separate smaller groups. Wild Cubes persist through cascade drops until they form part of a winning cluster and are removed.

Multiplier Cubes are the win-escalation mechanism. They are special cubes that carry a multiplier value (1x-5x). When a winning cluster forms adjacent to a Multiplier Cube, the cluster win is multiplied by the Multiplier Cube’s value. Multiple Multiplier Cubes adjacent to the same cluster compound their values. In the base game, Multiplier Cubes reset after each spin. During free spins, Multiplier Cubes accumulate: their values increase with each cascade and they persist across spins.

Bonus Features

Gravity Drop and Chain Reactions

Gravity drop and chain reactions are the structural mechanics that define every spin of Cubes. After a winning cluster is removed, cubes fall from above by gravity, new cubes enter from the top, and if new clusters form, they pay and the process repeats. The depth of a chain reaction depends entirely on RNG cube distribution: some spins produce single chains of 2-3 consecutive wins, while extraordinary spins during free spins produce chains of 8-10. The visual pacing of chain reactions is one of Cubes’ most engaging aspects: each drop wave is visible, clusters light up as they form, and the accumulating chain win counter grows with each successive drop. During base game, chain reactions are moderate in frequency: roughly 20-30% of winning spins produce at least one cascade continuation. During free spins with accumulated Multiplier Cubes, chain reactions are more valuable because each successive win in the chain applies the current Multiplier Cube values, not just the initial cluster win.

Multiplier Cubes

Multiplier Cubes are special cube symbols with visible multiplier values (1x-5x in the base game). When they land adjacent to a winning cluster, the cluster win is multiplied before being added to the spin total. The adjacency requirement means Multiplier Cube placement relative to the forming cluster matters: a Multiplier Cube on the far side of the grid from the winning cluster provides no benefit, while one embedded in the center of a large cluster maximizes its contribution. Multiple Multiplier Cubes adjacent to the same cluster multiply their values together: a 2x Multiplier Cube next to a 3x Multiplier Cube adjacent to the same cluster produces 6x total. During the free spins bonus, Multiplier Cubes do not reset between spins. Instead, any Multiplier Cube that survives (was not part of a winning cluster and therefore not removed) persists to the next spin and has its value incremented: a 2x that survives becomes a 3x. This accumulation is what drives the exponential win potential in free spins: a grid that has survived several chain reaction waves can accumulate multiple high-value Multiplier Cubes, and the next large cluster near these accumulated multipliers produces a massive win.

Wild Cubes

Wild Cubes substitute for any cube color in cluster formation. A Wild Cube embedded in a mixed-color group can bridge two colors, effectively combining what would be two separate small clusters into one large payable cluster. This is particularly valuable near Multiplier Cubes: a Wild Cube that extends a cluster to touch an adjacent Multiplier Cube enables the multiplier to apply to a win that would have been multiplier-free without the Wild. Wild Cubes also persist through cascade drops until they are part of a winning cluster and removed. During free spins, Wild Cubes interact with accumulated Multiplier Cubes to create compounding win scenarios: a large Wild-extended cluster adjacent to multiple accumulated Multiplier Cubes is the specific configuration that produces the highest individual spin wins.

Bonus Spin Trigger and Free Spins

The free spins phase triggers when scatter symbols appear on the 7x7 grid in sufficient numbers. Three scatters trigger the bonus, awarding a set number of free spins. During free spins, the Multiplier Cube accumulation mechanic is activated: instead of resetting after each spin, surviving Multiplier Cubes persist and their values increment. A free spin session that begins with 1x Multiplier Cubes and produces multiple chain reactions across 10-15 spins can see those multipliers reach 5x-8x by the final spins. The combination of large-cluster chain reactions and accumulated high-value Multiplier Cubes during the late spins of a free spin session is the pathway to the 10,000x ceiling. Retriggering adds more free spins if scatters land during the bonus phase.

Feature Buy

Flush provides Cubes Bonus Buy for eligible players. Direct entry into the free spins phase costs approximately 80x your current bet. This bypasses the scatter-trigger requirement and delivers immediate access to the Multiplier Cube accumulation phase. At €0.20 spin, that is €16. The Bonus Buy is valuable because high-volatility Cubes can run many base game spins without a natural trigger. Flush accepts BTC, ETH, USDT, TRX, and SOL for all Bonus Buy transactions.

Cubes RTP and Volatility

Cubes’ 96.19% RTP sits in the lower range of Hacksaw’s standard 96.1-96.4% spectrum. At release in 2021, this was competitive with the broader slot market. The sequel Cubes 2 marginally improved RTP to 96.25%, reflecting iterative calibration.

High volatility on a 7x7 cluster pays grid with Multiplier Cube accumulation creates a distinctive session pattern. The large grid means base-game winning spins are more common than on payline equivalents: with 49 positions, clusters of 5 form frequently, and the gravity cascade extends wins regularly. This elevated base hit rate partially offsets the high-volatility designation. However, the Multiplier Cube accumulation system creates enormous win variance within free spins: the difference between a free spins session with no Multiplier Cube accumulation and one with significant accumulation is dramatic.

Compare to Cubes 2 (96.25% RTP, High volatility): the sequel improved RTP by 0.06%, introduced Rainbow Cubes as an additional mechanism, and kept the same 10,000x ceiling. Both games have similar session profiles but the Rainbow Cube multiplier spread in Cubes 2 creates more explosive accumulation potential in free spins.

Compare to Jammin’ Jars (Push Gaming, 96.83% RTP): the RTP gap is significant (0.64 percentage points), which over 1,000 spins at €1 represents approximately €6.40 in theoretical return difference. Jammin’ Jars also has a higher max win at 20,000x. However, Flush players who prefer Hacksaw’s specific visual and mechanical style will find Cubes the more appropriate choice within the Hacksaw ecosystem.

For Flush session planning, high volatility at €0.10-€100 bet range means budget requirements scale widely. At €0.20 per spin, budget 300 base bets (€60) as a minimum for a comfortable session with multiple expected bonus entries.

How to Play Cubes on Flush

Flush hosts Cubes with a free demo accessible without registration. Find Cubes in the Hacksaw Gaming section of the Flush lobby or search directly. Click Play for Free to load with virtual credits. The 7x7 grid, gravity drops, and chain reactions are all fully functional in the demo. Spending time in the demo to watch how Multiplier Cubes behave during chain reactions is particularly valuable for understanding the free spins potential.

For real-money play, create a Flush account and deposit via BTC, ETH, USDT, TRX, or SOL. All five are accepted and processed promptly by Flush. Select Cubes from the Hacksaw section, set your bet between €0.10 and €100, and play. Bonus Buy for direct free spins access is in the game controls.

Flush withdrawals for Cubes winnings are processed in BTC, ETH, USDT, TRX, or SOL without unnecessary delay. Flush VIP members receive enhanced terms. The Flush promotions section may feature applicable Hacksaw offers.

Cubes renders well on mobile through Flush’s browser interface. The 7x7 grid fills available screen space cleanly, and cascade animations are smooth on modern mobile hardware.

Cubes Strategy Tips

Cubes’ high volatility and Multiplier Cube accumulation system require strategies specific to this format.

Use the free demo at Flush to understand the difference between base-game and free-spins Multiplier Cube behavior. In the demo, specifically try to observe a multi-spin free spins sequence where Multiplier Cubes accumulate across 3-4 spins: this is when the system’s highest wins materialize and understanding it before real-money play is genuinely useful.

Budget at least 300 base bets for Cubes. High volatility means extended dry stretches between bonus triggers. At €0.20 per spin, that is €60 minimum. The 7x7 grid’s higher base hit rate provides some natural credit replenishment, but high-volatility free spins triggers are still infrequent in absolute terms.

The chain reaction during free spins is not something you can influence: cube distribution is entirely RNG-governed. The strategic variable you control is bet sizing. At a bet size where you can comfortably buy the bonus 3-5 times if needed, the Bonus Buy provides the most efficient access to the Multiplier Cube accumulation phase.

Never adjust bet size mid-session based on chain reaction outcomes. Each spin is independent: a long chain on one spin provides no prediction about the next. Bet sizing decisions should be made before the session begins based on bankroll.

Similar Games to Cubes

1. Cubes 2 (Hacksaw Gaming, 96.25% RTP): The direct sequel with Rainbow Cubes, improved RTP, and same 10,000x ceiling but more explosive chain reaction potential.
2. Jammin’ Jars (Push Gaming, 96.83% RTP): The benchmark cluster pays gravity drop slot with a 20,000x ceiling and significantly higher RTP.
3. Jammin’ Jars 2 (Push Gaming, 96.40% RTP): Push Gaming’s sequel with 100,000x ceiling and enhanced multiplier mechanics.
4. Reactoonz (Play’n GO, 96.51% RTP): A high-volatility cluster pays slot with grid-filling special characters and a 4,570x ceiling.
5. Circle of Life (Hacksaw Gaming, 96.33% RTP): High-volatility Hacksaw slot with a Tree of Life mechanic and cycling symbols, 15,000x ceiling.

Our Rating

4.1/5

Cubes earns its place as a foundational Hacksaw title. The 7x7 grid, gravity drops, and Multiplier Cube accumulation created a template that influenced the Hacksaw catalog for years after. At 96.19% RTP, it is slightly below the best Hacksaw options, and the Cubes 2 sequel improved on it. However, the original remains a high-quality high-volatility cluster pays experience at Flush with genuine character.

FAQ

How does the gravity drop mechanic work in Cubes?

When a winning cluster of 5 or more matching cubes is identified and pays out, those cubes are removed from the 7x7 grid. All cubes above the removed positions fall downward by gravity to fill the empty spaces, and new cubes enter from the top of the grid to fill any remaining empty positions in the top rows. If the newly positioned cubes form new connections with existing cubes, another winning cluster forms and pays. This cascade chain continues until no new clusters form after a drop. As described in general slot mechanics at https://en.wikipedia.org/wiki/Slot_machine, cascade mechanics like this are standard in modern cluster pays designs. During free spins, Multiplier Cubes persist through these drops and accumulate value, dramatically increasing the worth of late-sequence chains.

What are Multiplier Cubes in Cubes?

Multiplier Cubes are special symbols on the 7x7 grid carrying a multiplier value of 1x-5x. When a winning cluster forms adjacent to a Multiplier Cube, the cluster win is multiplied by the cube’s value. Multiple adjacent Multiplier Cubes compound their values together. In the base game, Multiplier Cubes reset after each spin. In free spins, surviving Multiplier Cubes persist and increment: a 2x Multiplier Cube that is not removed in a cascade wave becomes a 3x on the next spin. This accumulation is the primary driver of high-win events in Cubes. As outlined at https://en.wikipedia.org/wiki/Return_to_player, RTP reflects the long-run value of all these mechanics combined across millions of spins.

What is the maximum win in Cubes?

The maximum win in Cubes is 10,000x your bet. At the €0.10 minimum bet, this is €1,000. At the €100 maximum bet, the ceiling is €1,000,000. Reaching 10,000x requires a free spins session where Multiplier Cubes accumulate to high values (5x-8x) across multiple spins, large winning clusters form adjacent to those accumulated multipliers during chain reactions, and Wild Cubes extend cluster reach to maximize multiplier adjacency. This convergence of conditions is rare but constitutes the designed pathway to the ceiling.

What is the RTP of Cubes?

Cubes has an RTP of 96.19%. This is in the standard Hacksaw Gaming portfolio range and represents €96.19 returned per €100 wagered over an infinite theoretical spin count. Individual sessions will vary widely. The sequel Cubes 2 improved this to 96.25%. Players who want the best RTP within the Cubes format should consider Cubes 2 at Flush, but the original Cubes remains a high-quality option with identical max win and similar mechanics.

Can I play Cubes for free at Flush?

Yes. Flush provides a complete free demo of Cubes with no registration or deposit required. The demo includes all mechanics: the 7x7 grid, gravity drops, chain reactions, Wild Cubes, Multiplier Cubes, and the free spins phase with Multiplier Cube accumulation. The free demo is the best way to understand the chain reaction system and Multiplier Cube behavior before committing real funds via BTC, ETH, USDT, TRX, or SOL on Flush.

Cubes Mechanic Deep Dive

Cubes was Hacksaw Gaming’s proof of concept for large-grid cluster pays with progressive multiplier mechanics. Understanding its architecture helps explain why the studio returned to it repeatedly in sequels and spiritual successors.

The 7x7 grid with 49 positions creates a fundamentally different probability space than the typical 5x5 cluster pays grids common at the time of Cubes’ 2021 release. With 49 positions, the probability of landing 5+ same-color cubes is substantially higher than on a 25-position grid. The minimum cluster size of 5 is easily met, and clusters of 10-20 cubes form in favorable drops. Larger clusters create more gaps when removed, which means more new cubes entering from above, which means more potential for subsequent clusters. The 7x7 format is therefore self-amplifying: larger initial clusters beget more impactful cascades.

The Multiplier Cube system creates win non-linearity. Without Multiplier Cubes, win value scales roughly linearly with cluster size: a 10-cube cluster pays roughly twice a 5-cube cluster. With Multiplier Cubes, adjacency can create non-linear scaling: a 5-cube cluster adjacent to a 5x Multiplier Cube pays as much as a 25-cube non-multiplied cluster (if the 5-cube cluster’s base pay value equals the 25-cube cluster’s base value, which it would if they are the same symbol type). This non-linearity creates opportunities for wins that are disproportionate to raw cluster size, which is the mechanical basis for high-win events that do not require 30+ cubes to form simultaneously.

The free spins accumulation system compounds this non-linearity over time. A Multiplier Cube that survives from spin 1 to spin 8 of a free spins session has incremented from 1x to 8x. Adjacent to a chain reaction large cluster on spin 8, that 8x cube converts a base win into an 8x win. If multiple such cubes are on the grid simultaneously, the compound multiplication can produce individual cascade wins in the hundreds or thousands of x range.

The chain reaction depth during free spins is the final variable. A chain of 6 consecutive winning cascades from a single spin, each with one or more high-value Multiplier Cubes adjacent, accumulates wins sequentially. The total for that spin is the sum of all cascade wins, each amplified by their respective adjacent multiplier values. This additive accumulation across deep chains is why Cubes’ 10,000x ceiling is reachable without requiring any single cascade win to equal 10,000x: instead, many moderate cascade wins summing to 10,000x is the realistic path. Flush players who understand this architecture can appreciate why Cubes sessions are fundamentally about cascade depth during free spins rather than a single lucky spin.

Cubes holds a special place in Hacksaw Gaming’s catalog as the foundational title that established the studio’s cluster pays identity. Released in 2021 when Hacksaw was still building its catalog recognition, Cubes demonstrated that a simple visual concept (colored cubes on a large grid with gravity mechanics) could support a deep mechanical system. The success of Cubes directly led to Cubes 2 in 2022 and influenced the cluster pays approach visible in subsequent Hacksaw titles including Le Cowboy and Circle of Life. For players who want to understand the mechanical roots of Hacksaw’s cluster pays philosophy, Cubes is the starting point.

The 7x7 grid size deserves comparison to other cluster pays titles in the market. At the time of Cubes’ 2021 release, Jammin’ Jars from Push Gaming was the benchmark cluster pays title with a 7x7 grid (also 49 positions). Cubes essentially adopted the same grid dimension, suggesting that 7x7 represents a recognized optimal size for cluster pays mechanics: large enough to produce meaningful cluster sizes and deep cascades, compact enough to remain visually comprehensible on standard screen sizes. Subsequent Hacksaw cluster pays titles have used different grid sizes (6x5 for Le Cowboy), suggesting iterative design evolution from the Cubes baseline.

The Multiplier Cube system in Cubes has a specific interaction with cascade depth that creates exponential rather than linear win scaling. In a shallow cascade (2 waves), Multiplier Cube contributions are limited: a 3x cube adjacent to the initial cluster and a 2x cube adjacent to the secondary cascade cluster would produce 3x on the first win and 2x on the second. Total: first cluster × 3 + second cluster × 2. In a deep cascade (6 waves), if a Multiplier Cube survives through 5 of those waves without being removed, it has accumulated to 6x by the sixth wave. Applied to the sixth cascade win, the 6x amplification is compounded on top of the already-accumulated chain win total. This depth-dependent exponential scaling is why free spins cascade depth is the most important variable in Cubes: the difference between a 3-wave free spins cascade and a 6-wave free spins cascade is not twice the value but potentially many times higher due to the accumulated multiplier application in the later waves.

Flush players who are experienced with cluster pays from other providers but new to Cubes specifically should note the 7x7 grid’s visual complexity. With 49 positions and multiple cube types (standard, Wild, Multiplier), identifying winning clusters and multiplier positions simultaneously takes practice. The demo is particularly valuable here: spending 20-30 free spins in the demo specifically identifying Multiplier Cube positions and tracking their values across cascade waves builds the visual pattern recognition that makes real-money play more informed.

The free spins trigger in Cubes uses scatter symbols that appear on the grid like any other symbol. Three scatters trigger the bonus; more scatters award additional spins. The scatter symbols are visually distinct from the standard cube colors and from Wild and Multiplier Cubes. During cascades, scatters that land in winning clusters are removed like standard symbols, but scatters that land in non-winning positions remain on the grid and can contribute to the scatter count on subsequent cascade waves. This means a spin that produces a deep cascade chain can accumulate scatter symbols across waves, potentially reaching the 3-scatter threshold and triggering the bonus from a single spin that started with only 1 scatter. This cascade-scatter interaction is important for understanding why free spins triggers in Cubes sometimes feel surprising: they can arrive from cascades on spins that did not initially seem to have bonus potential.

The 10,000x ceiling is the same in both Cubes and Cubes 2. The architectural path to this ceiling differs between the two games. In Cubes, the path is primarily through deep cascade chains with standard Multiplier Cubes reaching high accumulated values through survival. In Cubes 2, the Rainbow Cube’s grid-wide application creates additional paths. Both paths are valid; neither is inherently easier than the other in terms of probability. The selection between Cubes and Cubes 2 at Flush should therefore be based on which mechanic you find more engaging (standard adjacency multipliers versus grid-wide Rainbow multipliers) rather than on any expectation that one is more likely to produce the 10,000x ceiling than the other.

The original Cubes also benefits from being a 2021 release with more community documentation than newer Hacksaw titles. The slot streaming and community databases of session outcomes for Cubes are more comprehensive than for games released in 2025-2026. Players who research slot performance before playing will find more reference data for Cubes than for most newer Hacksaw titles. This additional information base is a minor but real advantage for players who like to calibrate expectations from community data rather than solely from theoretical RTP figures. Flush displays confirmed RTP and all mechanical parameters, but community session documentation adds texture that theoretical figures alone cannot provide.

For Flush players choosing between Cubes and Cubes 2 as a regular game, a practical suggestion is to start with Cubes for its simpler mechanic set (Multiplier Cubes only, no Rainbow Cubes) and progress to Cubes 2 once the cascade and multiplier mechanics are fully familiar. The absence of Rainbow Cubes in the original means the outcome of any given cascade is more directly readable: you can identify which Multiplier Cubes are adjacent to which clusters and estimate the likely multiplier outcome. This readability is a genuine accessibility advantage for players learning Hacksaw’s cluster format. Using BTC, ETH, USDT, TRX, or SOL at Flush to fund sessions across both Cubes titles allows you to experience both as part of a deliberate progression through Hacksaw’s cluster pays catalog.

Related Pages at Flush

• Cubes 2 Slot Review & Free Demo — direct sequel adding Rainbow Cubes for grid-wide multiplier application across all clusters
• Circle of Life Slot Review & Free Demo — fellow cluster-format title with ecosystem growth mechanics and win-cycling
• Bigger Barn Bonanza Slot Review & Free Demo — farm-themed cluster pays alternative for fans of the Hacksaw cluster engine
• Hacksaw Gaming Casino Games at Flush — complete Hacksaw catalogue across all volatility profiles

About the Author

Marcus Lindqvist has covered casino game mechanics for nine years, specialising in high-volatility slot design, RTP analysis, and mechanic documentation for crypto casino platforms. He has played over 500 distinct slot titles and tracks bonus trigger frequency, max win distribution, and mechanical depth as verifiable metrics. Marcus’s reviews at Flush focus on practical information: what each mechanic does, how it contributes to the max win ceiling, and what session budget realistically covers the variance profile of each title. He holds a certification in responsible gambling education and includes budget framing and demo play guidance in every review. Responsible gambling support is available at GamCare, a free confidential resource for anyone affected by gambling harm. Flush supports responsible gaming with deposit limits, session controls, and self-exclusion accessible from account settings.