Quick answer
Stack Em is a Hacksaw Gaming slot (2021) with 96.2% RTP, high volatility and a 10,000x max win. It uses cluster pays with free spins, multipliers and wild symbols. An official free demo is available. RTP can vary by casino.
Key specs
- RTP
- 96.2%
- Volatility
- High
- Max win
- 10,000x
- Grid
- 5×6
- Pays
- Cluster pays
- Released
- 14 May 2021
- Bet range
- $0.20–$100
Not published by the provider: jackpot
Casinos with Hacksaw Gaming games
- Velmora150 No-Wager Free Spins Keep every winNo wageringCarries Hacksaw GamingPlay at Velmora (opens in new tab)
18+. New customers. Min dep $20. No wagering. 7 days. 150 spins on Big Bass Bonanza at $0.10. Full T&Cs apply.
Key terms
18+. New customers only. Min deposit $20. No wagering on winnings. Free spins on Big Bass Bonanza at $0.10 per spin. Offer valid 7 days. Full T&Cs apply. Please gamble responsibly.
Check Stack Em is in the lobby in your country.
Free demo Members
Try Stack Em with play money before deciding whether to play for real. Official Hacksaw Gaming demos are free for GambGenius members.
How to play Stack Em (members only)
Wins pay for groups of matching symbols that touch horizontally or vertically. Larger clusters pay more, and winning clusters usually disappear to make room for new symbols.
Stack Em is played on a 5×6 grid with cluster pays.
- Set your stake. Choose your total bet per spin between $0.20 and $100. Wins are paid as multiples of this stake.
- Check the paytable. Open the game's info screen to see what each symbol pays and the exact rules for this version.
- Spin. Each spin's result is decided by a certified random number generator, independent of previous spins.
- Trigger the bonus. Land the required scatter symbols to start the free spins feature.
- Optional bonus buy. Where permitted, pay a fixed price to start the bonus directly.
The full Stack Em guide: how winnings work, 6 features and 4 strategy tips
- Your stake plan: a $50 budget → about $0.17 a spin (high volatility)
- What 96.2% RTP costs per $100 wagered: $3.80 on average
- 6 features explained: free spins, multipliers, wild symbols, respins, bonus buy and 1 more
- Bonus-buy risk breakdown
- Stake plans for $20 to $250 budgets, checked against the $0.20 minimum bet
- 4 slots with the same style and a higher RTP (up to 98.18%)
- Strategy tips and a session planner for Stack Em
Free · no card · 18+ only
Never sold · export or delete any time · What do members get?
How winnings work (members only)
What 96.2% RTP costs per $100 wagered, the 10,000x max win at a $1 stake
The top prize is capped at 10,000x your stake. On a $1 spin that is $10,000; on $0.20 it is $2,000. When the cap is reached the round usually ends immediately.
Because wins don't depend on lines, every symbol in view can count towards a pay. The paytable lists how many matching symbols each tier needs.
Multipliers are applied to wins as they land; in many games several multipliers add together or multiply each other, which is where the largest wins come from.
What 96.2% RTP means
Expected return = stake × 96.2%
Over $100 of total bets, the long-run average loss is $3.80
RTP is a long-run average across millions of spins. Any single session can finish far above or below it, especially on a high volatility game.
Features explained (members only)
6 features explained: free spins, multipliers, wild symbols, respins and more
Free spins
A bonus round of spins played at no cost to your balance, usually triggered by landing three or more scatter symbols. Wins during the round are added to your balance, and many games let you retrigger extra spins.
Multipliers
Multipliers increase a win by a set factor, such as 2x or 10x. They can be attached to symbols, applied to a whole spin, or grow during a feature, and are a main driver of the biggest wins.
Wild symbols
Wilds substitute for regular paying symbols to help complete winning combinations. They do not normally replace scatter or bonus symbols.
Respins
Selected reels or the whole grid spin again without a new stake, usually triggered by a specific symbol combination or near-miss feature.
Bonus buy
Lets you pay a fixed multiple of your stake to enter the bonus feature straight away instead of waiting for it to trigger. It raises variance considerably and is not available in every country (it is banned in the UK).
Cluster pays
Wins are formed by groups of matching symbols touching horizontally or vertically, rather than along lines.
Strategy tips (members only)
- Size your stake to the volatility. High volatility concentrates the return in rare, large wins. Long losing runs are normal. Keep stakes small (around 1% of your session budget or less) so you can ride out the swings. A simple rule: bring at least 300 spins' worth of budget, so a $50 budget suggests a stake of about $0.17.
3 more tips and a session planner
- Treat bonus buys as high-risk. Buying the feature concentrates your budget into a few large-variance rounds. Many results return less than the price paid. Read our bonus buy guide first.
- Bonus wagering: at 96.2% RTP, clearing $1,000 of wagering costs about $38.00 on average. Check the bonus terms, as some casinos exclude specific games. Run your numbers in the wagering calculator.
- Set limits before you spin. Decide your loss limit and session time in advance and stop when you reach either. No pattern or betting system changes the outcome of a spin.
More on this in slot RTP and volatility explained and bankroll management.
Does it fit your budget? (members only)
Stake plans for $20 to $250 budgets, checked against the $0.20 minimum bet
For high volatility we suggest a budget of at least 300 spins. This is what that means for Stack Em (bets from $0.20 up to a maximum bet of $100).
| Budget | Stake a spin | Bet range | Average cost of 300 spins |
|---|---|---|---|
| $20 | $0.07 | Below the $0.20 minimum bet | $0.76 |
| $50 | $0.17 | Below the $0.20 minimum bet | $1.90 |
| $100 | $0.33 | Fits | $3.80 |
| $250 | $0.83 | Fits | $9.50 |
Averages only: a short session can end far above or below them. Set a loss limit before you play.
Same style, better RTP (members only)
4 slots with the same style and a higher RTP (up to 98.18%)
Slots with the same mechanic (cluster pays) and volatility (high) as Stack Em, with a higher published RTP. Casinos can still run lower versions of any of them.
Jack in a Pot98.18% RTP · +1.98 pts
Candy Tower98% RTP · +1.8 pts
Magic Oak98% RTP · +1.8 pts
Frenzy Clusters97.11% RTP · +0.91 ptsQuestions
Frequently asked questions
Who makes Stack Em?
Stack Em is developed by Hacksaw Gaming and was released in 2021.
What is the RTP of Stack Em?
The default RTP of Stack Em is 96.2%.
Is Stack Em high volatility?
Stack Em is rated high volatility. High volatility concentrates the return in rare, large wins.
What is the max win on Stack Em?
The maximum win on Stack Em is 10,000x your stake, which is $10,000 on a $1 spin.
Can I play Stack Em for free?
Yes. GambGenius members can play the official Hacksaw Gaming demo of Stack Em free on this page. It uses play money only, so demo wins can't be withdrawn, and it is for players aged 18 and over.
Does Stack Em have a bonus buy?
Yes. Stack Em includes a bonus buy option, although it is unavailable in some countries such as the UK.
Where can I play Stack Em?
Velmora carries Hacksaw Gaming games. Check Stack Em is in the lobby in your country before you sign up. 18+ · New customers · T&Cs apply. Availability varies by country.
Where this data comes from
- slotcatalog.com Slot database
Specs come from 1 independent slot database. Casinos can run lower-RTP versions, so always check the game rules before you play.
Game artwork © Hacksaw Gaming, shown to identify the game.
