What Is Jammin' Jars? Game Overview
Jammin' Jars is a video slot released by Push Gaming in September 2018, and it remains the studio's signature title. The theme is deliberately odd in the best way: vintage fruit-machine symbols — strawberries, oranges, raspberries, apples, plums and blueberries — dropped into a neon disco where a dancing jam jar presides over the grid. Underneath that presentation sits an 8×8 Cluster Pays board with no paylines at all.
Push Gaming is a London-founded independent studio with a catalogue of more than 40 titles, including Razor Shark, Big Bamboo and Fat Rabbit. Its games are certified for regulated markets and distributed under licences held with the Malta Gaming Authority and the Swedish Spelinspektionen, among other regulators. For players that matters in a practical sense rather than an abstract one: it means the maths model has been submitted for testing, the random number generator has been independently verified, and the RTP shown in the game's info panel is the figure the operator is obliged to run.
The game's reputation was built on volatility rather than gentle entertainment. Sessions can stay flat for long stretches, then a single free spins round with two or three high jar multipliers produces a result that pays for all of them. That reputation is also why Push Gaming returned to it in 2022 with Jammin' Jars 2, a sequel that keeps the cluster foundation and pushes the ceiling considerably higher — covered in detail further down this page.
How to Play Jammin' Jars: Rules & Mechanics
Getting started takes one decision. Set a stake between £0.20 and £100 with the bet adjuster below the grid, then spin — there are no lines to activate, so the stake is the only variable you control. The board fills, winning clusters pay and vanish, fresh symbols cascade into the gaps, and the round runs until a drop produces no new win.
Understanding the Cluster Pays System
If you have played Bejeweled or Candy Crush, the logic will feel familiar: matching symbols pay by touching each other, not by landing on a fixed line. In Jammin' Jars a win needs five or more identical fruits connected horizontally or vertically — diagonals do not count. The bigger the cluster, the steeper the payout curve, which is why a 25-symbol strawberry cluster is worth far more than five times a five-symbol one.
Six fruit symbols share one paytable, ranked by value. Payouts below are per £1 stake:
| Symbol | 5–9 | 10–14 | 15–19 | 20–24 | 25+ |
|---|---|---|---|---|---|
| Strawberry (highest) | £0.50 | £2.00 | £8.00 | £30.00 | £100.00 |
| Orange | £0.40 | £1.50 | £6.00 | £22.00 | £75.00 |
| Raspberry | £0.30 | £1.20 | £4.50 | £16.00 | £55.00 |
| Apple | £0.25 | £0.90 | £3.50 | £12.00 | £40.00 |
| Plum | £0.20 | £0.70 | £2.50 | £8.00 | £28.00 |
| Blueberry (lowest) | £0.15 | £0.50 | £1.80 | £5.50 | £18.00 |
A 25-symbol strawberry cluster therefore returns 100x the stake before any jar multiplier is applied — and it is that last clause where the game actually lives.
The Jam Jar Bonus Feature Explained
The jam jar is wild and scatter at once, and the whole bonus structure runs through it. Follow the sequence:
- Jars land on the grid. Each substitutes for any fruit, joining clusters it touches.
- Every win a jar takes part in raises its multiplier by +1. Cascades chain, so a single spin can lift one jar several steps.
- Three or more jars trigger Free Spins — six spins in which the jars lock in position rather than dropping away.
- Locked jars keep climbing. Because they never leave the board, their multipliers accumulate across the whole round with no cap, and multiple jars in one cluster multiply together.
- Landing further jars retriggers, extending the round and giving the multipliers more time to grow.
| Consecutive wins involving the jar | Jar multiplier | Effect on a 100x cluster |
|---|---|---|
| 1st win | x1 | 100x stake |
| 2nd win | x2 | 200x stake |
| 3rd win | x3 | 300x stake |
| 4th win | x4 | 400x stake |
| Each further win | +1, uncapped | Compounds with every cascade |
The Rainbow Feature covers the gaps. On base-game spins that produce nothing, it can fire at random and drop a giant fruit symbol onto the grid — a 2×2 or larger block counted as multiple individual symbols, usually large enough to force a cluster out of a dead spin and start a fresh cascade sequence.
Where regulation allows it, a Bonus Buy option purchases direct entry to Free Spins for roughly 84x the stake. It is not available everywhere: several regulated markets, the UK included, prohibit feature-buy mechanics outright, so the button simply will not appear at those operators. Our free spins guide breaks the round down spin by spin.
Jammin' Jars RTP, Volatility & Payouts
The headline number is 96.83% RTP. Across the European iGaming industry the working average sits between 94% and 96%, so Jammin' Jars returns roughly one to three percentage points more than a typical release — meaningful over tens of thousands of spins, invisible over an evening. One caveat matters more than the figure itself: some operators licence a reduced 94.25% build of the same game. Open the info panel before you play and check which version you are on.
Volatility is high, and that describes the session shape more accurately than the RTP does. Wins arrive irregularly, the base game frequently drifts, and the returns are concentrated in free spins rounds where locked jars have had time to compound. Budget accordingly: a bankroll that survives 200–300 spins at your chosen stake is the realistic minimum for seeing the feature more than once, and the swings on the way there are the price of the 20,000x ceiling.
That 20,000x max win is not a jackpot in the progressive sense — there is no separate prize pool. It is simply the theoretical maximum the maths model allows, reached when several high-multiplier jars sit inside the same large cluster during free spins. On a £1 stake that is £20,000; on £0.20 it is £4,000. Realistically, the great majority of completed bonus rounds land between 20x and 200x, with four-figure multiples rare and the maximum effectively a lottery outcome.
| Slot | Developer | RTP | Volatility | Max win |
|---|---|---|---|---|
| Jammin' Jars | Push Gaming | 96.83% | High | 20,000x |
| Sweet Bonanza | Pragmatic Play | 96.51% | High | 21,100x |
| Reactoonz | Play'n GO | 96.51% | High | 4,570x |
| Fruit Party | Pragmatic Play | 96.50% | High | 5,000x |
Against its closest cluster-pays rivals, Jammin' Jars holds the RTP advantage and matches the highest ceiling in the group. The full breakdown of both RTP builds and what high variance does to a bankroll is in our RTP and volatility guide.
Where to Play Jammin' Jars Online
Push Gaming distributes widely, so the game turns up in most major lobbies — PokerStars Casino, FanDuel Casino, BetMGM Casino, Sky Vegas and bet365 Casino among them, subject to your jurisdiction. Availability is not the same as suitability, though, and four checks separate a good home for this game from a poor one:
- A licence from a recognised regulator, displayed with a verifiable number rather than a generic seal
- Independent RNG certification from a testing house such as eCOGRA or iTech Labs
- The 96.83% build confirmed in the game's info panel, not the 94.25% alternative
- Withdrawal times stated in hours or days, with terms that do not cap winnings from a bonus at a token amount
Mobile access needs no special arrangement. The game is built in HTML5, so it renders natively in Safari, Chrome and every modern mobile browser, scaling the 8×8 grid to portrait without cropping the board or hiding the jar multipliers. There is no download and no dedicated app — see our casino comparison and mobile guide for the detail.
Jammin' Jars 2: What's New in the Sequel
Push Gaming released Jammin' Jars 2 in 2022, keeping the cluster foundation and rebuilding almost everything around it. The presentation is sharper, the soundtrack heavier, and the play area expands during features rather than staying fixed — the sequel's defining addition being the Giga Jar DJ, an oversized jar occupying a block of positions at once, carrying its own multiplier and dragging far more symbols into every cluster it touches.
The trade-off is visible in the numbers. The sequel's ceiling rises to 50,000x, two and a half times the original, while its RTP settles slightly lower at 96.40% against 96.83%. Volatility is high in both.
| Feature | Jammin' Jars | Jammin' Jars 2 |
|---|---|---|
| Released | September 2018 | 2022 |
| RTP | 96.83% | 96.40% |
| Max win | 20,000x | 50,000x |
| Signature modifier | Rainbow Feature | Giga Jar DJ |
| Volatility | High | High |
The Giga Jar DJ changes how a round develops rather than simply paying more. In the original, a bonus round is a race to stack individual jars before the six spins expire; in the sequel, one oversized jar anchors the board from the moment it lands, so clusters form around it almost by default and the multiplier climbs on nearly every cascade. That makes the sequel steadier inside the feature — and harsher outside it, since the base game leans even more heavily on reaching the bonus at all.
Which to play comes down to temperament. The original returns marginally more over the long run and its Rainbow Feature keeps dead spins from feeling entirely dead; the sequel swings harder and pays more at the top. Neither replaces the other, and both sit in most lobbies side by side.
If you want the same mechanic from a different studio, three alternatives are worth a look: Sweet Bonanza by Pragmatic Play (96.51%, high volatility, tumbling clusters with bomb multipliers), Reactoonz by Play'n GO (96.51%, high volatility, cascading alien clusters with charge-up mechanics), and Fruit Party by Pragmatic Play (96.50%, high volatility, random multiplier drops on a 7×7 grid).
Tips and Strategies to Maximise Your Wins
- Try the demo first — cluster pays behave nothing like paylines.
- Size the stake to the variance: about 1% of your session bankroll per spin keeps you in long enough to reach free spins.
- Set a stop-loss and a walk-away figure before you start — high variance makes both calls harder mid-session.
- Use autoplay loss limits to enforce the plan when the grid goes cold.
Fuller reasoning behind each of these is in our strategy guide.
Jammin' Jars Free Play vs Real Money
The demo version runs the same maths model as the real-money game, so it is genuinely useful rather than a marketing courtesy — it is the cheapest way to see how clusters chain, how quickly jar multipliers climb and how long the base game can drift between features. Free play is available in most casino lobbies without registration, and on independent databases such as BETO Slots. The one thing it cannot teach is bankroll discipline, which only starts to matter when the balance is your own.
Pros and Cons of Jammin' Jars
- Pros: 96.83% RTP above the category average; jar multipliers that compound without a cap in free spins; the Rainbow Feature rescuing dead spins; 20,000x ceiling; HTML5 play on any device.
- Cons: high variance with long dry spells; results concentrated in a bonus round that can stay out of reach; some operators run the reduced 94.25% build; bonus buy unavailable in several regulated markets.
Frequently Asked Questions
What is Jammin' Jars?
Jammin' Jars is a cluster pays video slot released by Push Gaming in September 2018. It replaces reels and paylines with an 8×8 grid where five or more touching symbols pay, and builds its bonus structure around jam jar wilds whose multipliers rise with every consecutive win.
What is the RTP of Jammin' Jars?
The standard build returns 96.83%, comfortably above the 94–96% industry average. Some operators licence a reduced 94.25% version of the same game, so check the figure in the in-game information panel before you start playing rather than assuming the higher number.
What is the volatility of Jammin' Jars?
High. Wins land irregularly and the base game can drift for long stretches, with most of the return concentrated in free spins where locked jars compound their multipliers. Plan for a bankroll that comfortably covers 200–300 spins at your chosen stake.
What is the maximum win in Jammin' Jars?
Up to 20,000x your stake — £20,000 on a £1 spin. It is a theoretical maximum from the maths model, not a progressive jackpot, and it requires several high-multiplier jars inside one large cluster during free spins. Most bonus rounds finish between 20x and 200x.
How do cluster pays work in Jammin' Jars?
Five or more identical fruit symbols must touch horizontally or vertically anywhere on the 8×8 grid — diagonals do not count. Winning clusters pay and disappear, new symbols cascade into the gaps, and the sequence repeats until a drop produces no further win.
What is the Rainbow Feature in Jammin' Jars?
A random modifier that can trigger on base-game spins which produce no win. It drops a giant fruit symbol onto the grid, counted as several individual symbols, which is usually enough to create a cluster from an otherwise dead spin and start a fresh cascade sequence.
Who developed Jammin' Jars?
Push Gaming, an independent studio with more than 40 titles including Razor Shark and Fat Rabbit. Its games are supplied to regulated markets under licences held with authorities such as the Malta Gaming Authority and the Swedish Spelinspektionen, with independently verified random number generation.