Real screenshot from our demo test, 2 Nov 2026
Hacksaw GamingReleased 25 May 2021
Stack'em Demo & review
A 5x6 Hacksaw cluster game where winning symbols stack at the bottom of the reels to unlock multipliers, and free spins build one total that an X symbol cashes.
Written by Hampus GravePublished 4 Nov 2026
Play money · no sign-up · no deposit
- RTP
- 96.2%
- Volatility
- High
- Max win
- 10,000x
- Grid
- 5x6
Play Stack'em for real at YEET
FluxPlays verdict
Our verdict
Only if you play it for the free spins. There every win adds to a total multiplier, ? symbols can add hearts or multiply that total, and an X touching a win cashes it, which gives the round real reach. The base game is the problem: its stacking counters have a low ceiling, and most of our base spins paid nothing at all.
Who it suits
Play this if…
- Bonus buyers: one card at a fixed price, and the round keeps building its total while the hearts last
- Players who like a round with stakes on every spin: each free spin can add hearts, raise the total or cash it through an X
- Learners: stacked winners and counters under the reels are unusual, and the demo shows them unlocking spin by spin
Skip this if…
- Short-session players: in our test barely one base spin in eight paid anything
- Base-game spinners: the stacking ceiling is low next to what the free spins total can reach
- Anyone who dislikes all-or-nothing rounds: a large total pays nothing unless an X meets a winning cluster
Where to play Stack'em
Stack'em is available at these casinos we have tested and reviewed. How we test casinos
YEET
18+ · T&Cs apply
SafeCasino
FluxPlays score 7.5
Skrill withdrawal paid out in 18 hours in our test
400% up to €4,000 + 1,200 free spins
- 40x wagering
- min deposit €10
- 30 days
400% welcome package up to 4,000 over four deposits, each 100% up to 1,000 plus 300 free spins. 40x wagering on bonus and free spin winnings. Minimum 10 to activate, 200 for the full 300 spins. 30 day validity. Free spins run on Pragmatic Play games.
18+ · T&Cs apply · Offer checked 7 Oct 2026
Betlabel
FluxPlays score 7.0
E-wallet payout inside 24 hours in our test
200% up to €1,500 + 150 free spins
- 35x wagering
- min deposit €10
- 7 days
200% welcome package up to 1,500 plus 150 free spins over four deposits: 100% up to 300 + 30 FS, 50% up to 350 + 35 FS, 25% up to 400 + 40 FS, 25% up to 450 + 45 FS. 35x wagering, 7 day window. Minimum 10 first deposit, 15 thereafter. Crypto deposits are not bonus eligible.
18+ · T&Cs apply · Offer checked 7 Oct 2026
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Stack'em: Full Review
In Stack'em a win does not simply tumble away: the winning symbols drop to the bottom of their reels, and counters under the reels turn those stacks into a multiplier for the clusters above them. Hacksaw Gaming's 5x6 cluster game brings back Canny the Can and Mona the Mouse, and its free spins swap the stacks for one total multiplier that only an X symbol can cash. It suits bonus buyers far more than base-game spinners.
Stack'em game information
- Provider
- Hacksaw Gaming
- Release date
- 25 May 2021
- Grid
- 5 x 6 (reels x rows)
- How it pays
- Cluster pays, 5+ symbols
- RTP
- 96.2% (casinos may also run 96.2% (Freespins buy))
- Volatility
- High
- Max win
- 10,000x the bet
- Bonus buy
- Freespins 129x (RTP 96.2%, labelled High volatility)
The grid before our first spin, every reel counter still locked. FluxPlays demo test, 2 November 2026.
How Stack'em works
Five or more matching symbols that connect anywhere on the grid form a winning cluster, and the WILD replaces any paying symbol. The grid is five reels of six rows, so the largest clusters are rare and the paytable climbs steeply toward them.
| Cluster, pays at $1 | A, G, E, R, T | Leaf, crow, skull, snake | Thumbs up |
|---|---|---|---|
| 5 or 6 | $0.10 | $0.25 | $0.50 |
| 9 or 10 | $0.40 | $2.00 | $4.00 |
| 15 to 19 | $4.00 | $20.00 | $30.00 |
| 25 or more | $25.00 | $100.00 | $200.00 |
The thumbs up is the symbol to hope for. The letter blocks fill most of the grid and pay least, so a small letter cluster on its own is worth very little until a multiplier sits under it.
The symbol payouts page in our session, with the RTP line underneath. FluxPlays demo test, 2 November 2026.
How the stack multipliers work
After every win the symbols that did not win are removed, and the winners fall to the bottom of their reels. A counter under each reel then shows how many stacked winning symbols that reel holds. A winning cluster is multiplied by the sum of the counters under the reels it sits above, so a cluster spread over several stacked reels collects all of them at once. The intro gives the stacking a ceiling of 30x.
Spin 100 of our test shows the end state. Thumbs-up blocks sat stacked at the bottom of reels 3 and 4, with 2x and 3x unlocked beneath them. The spin paid $3.00.
Spin 100 settled with 2x and 3x unlocked under reels 3 and 4, WIN $3.00. FluxPlays demo test, 2 November 2026.
Free spins: hearts and a total multiplier
Three or more free spin scatters start the round with five hearts, and it runs until no hearts remain. The stacking stops here: every symbol is cleared between spins, and each win instead adds its cluster size to a total shown above the reels, so a cluster of six adds 6. Three special symbols decide what that total is worth.
| Symbol | What it does in free spins |
|---|---|
| X | Can land on any free spin. A winning cluster that connects with it is multiplied by the total |
| ? | Gives 2 to 5 extra hearts, or adds 1, 2, 5, 10, 25 or 50 to the total, or multiplies the total by 2, 3, 4 or 5 |
| Heart | One life. The round ends when the last one is gone |
| WILD | Replaces any paying symbol, as in the base game |
So the round has two halves that must meet. Wins and ? symbols build the total, but the total pays nothing until an X sits against a winning cluster. A big number above the reels is a promise, not a payout.
Bought free spins: the total at 22x, an X on the grid and a ? symbol turning over. FluxPlays demo test, 2 November 2026.
The Buy Bonus panel offers a single card, Freespins, at 129x the bet. It starts the same round as three scatters, and the card itself labels it High volatility.
RTP, volatility and max win
The rules give 96.2% as the RTP of both the base game and the buy, each figure calculated over ten billion simulated rounds. The base game carries no volatility label. The buy card says High, and review sites rate the game High as well, so High is the label we use.
No single round can pay more than 10,000x the bet. The stacking has its own ceiling, so the realistic route toward the cap is a free spins round that keeps its hearts, grows its total through ? multipliers and then lands an X against a large cluster.
The intro screen's three feature cards. FluxPlays demo test, 2 November 2026.
Our Stack'em demo test
FluxPlays demo test
2 November 2026, demo running 96.2% RTP
Base game spins
100
at $1 per spin
Staked
$100
Paid back
$17
17% of stake, -$83
Winning spins
12 of 100
12% of spins paid something
Biggest win
$3 (3x)
spins 66 and 100 both paid $3.00; spin 100 settled with 2x and 3x unlocked under reels 3 and 4; no natural free spins
Free spins triggered
0
natural triggers in the session
Bonus buys tested
Freespins (129x)
five hearts, 9 free spins played, the total multiplier reached 35x
$129 in
$11.10 back
0.09x its price
11.1x the $1 bet
Played on Hacksaw Gaming's official fun demo (client 1.64.1, game version 1.0.2) on 2 November 2026, with a $5,000 USD demo balance and no sign-in. The demo opened at $2.00 and was set to $1.00 for every counted round. One session, no reload: the 100 base spins, then the Freespins buy, the only option in the Buy Bonus panel. Round wins are read from the game server's replies. Totals: $229.00 staked, $28.10 back, closing balance $4,799.10 on the server and on screen.
The base game was hard going. Only 12 of our base spins paid anything, none of them more than three times the stake, and one stretch of 19 spins went by without a win. The stacking counters did unlock on winning spins, but only ever at small values.
The bought round started with five hearts and lasted nine spins. Wins and ? symbols lifted the total to 35x along the way, and the round closed at $11.10. A natural trigger and stacking anywhere near its ceiling did not come up, so both rest on the rules here. This is one logged session, not a measure of the game's return.
The bought round's total: $11.10 from 9 free spins. FluxPlays demo test, 2 November 2026.
Is Stack'em worth playing?
For the free spins, yes, and the buy is the practical way in. For the base game, no. The round is the reason Stack'em exists: hearts give it length, the ? symbol can multiply the total itself, and every X is a moment that can turn the whole round. The base game mainly waits for scatters while paying small letter clusters.
Pick Le Bandit if you want a Hacksaw cluster game at Medium volatility, where wins leave Golden Squares that a Rainbow turns into prizes, with two buys and FeatureSpins to choose from. Pick Stack'em if you want one bonus with a single total that builds over the round and pays only when the X connects.
Buy the round once in the demo and keep your eyes on the X rather than the total. How often it touches a winning cluster is what decides a round here.
Frequently Asked Questions
How do the stack multipliers work in Stack'em?+
Winning symbols drop to the bottom of their reels, and a counter under each reel shows how many stacked winners it holds. A winning cluster is multiplied by the sum of the counters under the reels it covers, up to 30x by the intro. In our session the counters only ever unlocked at small values.
How do free spins work in Stack'em?+
Three or more free spin scatters start the round with five hearts, and it lasts until the hearts run out. Each win adds its cluster size to a total multiplier, ? symbols add hearts or raise the total, and the total only pays when an X symbol connects with a winning cluster.
Can you buy the bonus in Stack'em, and what does it cost?+
Yes, one option: Freespins for 129x the bet, at the same 96.2% RTP as the base game, labelled High volatility on its card. It starts the same hearts-and-total round as three scatters. Our one bought round ran nine spins with the total reaching 35x.
What is the max win in Stack'em?+
Wins stop at 10,000x the bet, as the rules and intro state. The base game's stacking has a low ceiling of its own, so a win that size belongs to the free spins: a long round whose total has been multiplied by ? symbols, then cashed by an X against a big cluster.
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