Jammin Jars Slot Review
A mirrorball the size of a small moon hangs over this grid, spilling pink and blue light across a wall of lit tiles while spotlights sweep magenta and cyan through the haze. It’s a 1970s disco floor, and Push Gaming has committed to it completely, right down to the lens-flare stars. Strip away the party and Jammin Jars is really a game about one symbol: everything that pays properly here happens because a jar wandered into the right place at the right time.
It’s an 8×8 cluster-pays grid with a 96.83% RTP, high volatility and a 20,000x maximum win, on bets from 0.2 to 100 per spin. Sister titles like Razor Shark and Fat Rabbit show what this studio does with patient maths, but this is the purest version of the big-grid idea. The disco floor is the game.
How the 8×8 Grid Pays
Wins need five or more matching symbols touching vertically or horizontally. There are no reels in rows and no win lines to trace; a cluster is a cluster, wherever it sits on the board. Winning symbols are then removed and everything above collapses down to fill the gaps.
That collapse can build new clusters and chain further wins from a single spin, and the chain only stops when no new cluster forms. The pays are multiples of the total bet, and they scale hard with cluster size. Five symbols barely gets you started; the big money needs clusters of twenty or more.
- Strawberry – 5 pays 1x, 6 pays 1.5x, 7 pays 2x, 8 pays 2.5x, 9 pays 3x, 10-11 pays 5x, 12-14 pays 10x, 15-19 pays 20x, 20-24 pays 40x, 25+ pays 100x
- Orange – 5 pays 0.5x, 6 pays 0.75x, 7 pays 1.25x, 8 pays 2x, 9 pays 2.5x, 10-11 pays 3x, 12-14 pays 6.25x, 15-19 pays 10x, 20-24 pays 25x, 25+ pays 62.5x
- Raspberry – 5 pays 0.25x, 6 pays 0.5x, 7 pays 0.75x, 8 pays 1x, 9 pays 1.25x, 10-11 pays 2x, 12-14 pays 4x, 15-19 pays 7.5x, 20-24 pays 15x, 25+ pays 37.5x
- Green Apple / Purple – 5 pays 0.15x, 6 pays 0.2x, 7 pays 0.4x, 8 pays 0.6x, 9 pays 0.8x, 10-11 pays 1x, 12-14 pays 3x, 15-19 pays 5x, 20-24 pays 10x, 25+ pays 25x
- Blueberry – 5 pays 0.1x, 6 pays 0.15x, 7 pays 0.2x, 8 pays 0.3x, 9 pays 0.6x, 10-11 pays 0.8x, 12-14 pays 1x, 15-19 pays 3x, 20-24 pays 4x, 25+ pays 10x
The strawberry does the heavy lifting at the top of that ladder, and the drop-off between tiers is steep. That steepness is the design. Small clusters exist to keep the board moving, and the real money only arrives when a cascade grows something enormous.
The Jam Jar Symbol
The Jam Jar is a wild that substitutes for every other symbol, and it’s also the scatter, but neither of those is the interesting part. Each jar carries its own multiplier, starting at 1x, and every time a jar contributes to a cluster win, its multiplier increases by one. The current multiplier applies to any win that jar helps create.
A jar that survives a long collapse chain grows stronger with each step. When a jar contributes to a win, it doesn’t disappear with the cluster; it hops to an adjacent vacant position before the next collapse, and during collapses it’s held in place rather than falling with the fruit. Jars that land together and start multiplying in the same corner of the board are where the biggest results come from.
Three or more Jam Jars landing anywhere triggers the Free Games Feature, which is the scatter half of the symbol’s job.
The Rainbow Feature
After any non-winning collapse, a rainbow can sweep across the board unannounced. It drops one or more Giant Fruit Symbols of a single type onto the grid, and every position a giant covers converts to that same fruit. The practical effect is a sudden, oversized cluster where a moment ago there was nothing.
It’s random, so there’s no collecting or building towards it. What it does is rescue dead spins: a collapse chain that stalls can restart itself in one move. Because giant fruits convert whole blocks of tiles, the resulting cluster can reach the double-digit range where the pay ladder starts paying properly.
Free Games Feature
Landing three or more Jam Jars anywhere awards six free games. There’s no retrigger, so six spins is what you get. What makes the round work is that the jar behaviour carries over and then compounds: jars still hop after contributing to wins, they’re still held through collapses and cascades, and their multipliers still climb.
Six spins doesn’t sound like much, and it isn’t. Jars which trigger the feature keep whatever multiplier momentum the base game gave them, and every win inside the feature pushes those numbers higher. A free games session where two or three jars cluster up and keep winning is the realistic route towards the game’s 20,000x ceiling.
If that momentum never arrives, the round is over almost as soon as it started. Six spins, no retrigger, and everything riding on the jars.
For quick reference, here’s everything the three features need and award:
- Jam Jar Symbol – lands on the reels as a wild; multiplier starts at 1x and grows by one after any cluster win it contributes to
- Rainbow Feature – randomly triggers after any non-winning collapse or cascade; adds one or more Giant Fruit Symbols of the same type
- Free Games Feature – triggered by 3 or more Jam Jars landing anywhere; awards 6 free games with jars held through every collapse and cascade
Our Honest Verdict
Overall Rating: 7.5/10
Playing Jammin Jars mostly means watching a very pretty grid do very little, waiting for a jar to wander somewhere useful. That’s the whole reason to pick it: the jar that walks, survives and multiplies is a smarter piece of design than any disco dressing, and the quiet stretches are when it’s quietly building towards something.
Its strength is that every system pulls in the same direction. Collapses grow clusters, jars ride the collapses, and the free games are where the multiplier finally gets room to run. Its weakness is how little room that is: six spins, no retrigger, and a bonus round that can be over before it starts.
This is a game for people who enjoy the long build and can sit through a quiet floor waiting for the music to start. Anyone after frequent, steady payouts will find the wait longer than the party. But when the jars line up under that mirrorball, the wait makes sense.
Jammin Jars FAQs
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What is the RTP of Jammin Jars?
Jammin Jars runs at an RTP of 96.83%, which is a strong figure for a high volatility slot. -
Is Jammin Jars high volatility?
Yes, it’s a high volatility game. Wins can be infrequent, but the cluster system and jar multipliers give it serious potential when things connect. -
How do wins work in Jammin Jars?
Wins are cluster pays rather than paylines. You need five or more matching symbols touching vertically or horizontally, and winning symbols are removed so others collapse into the gaps. -
What is the grid size of Jammin Jars?
It’s an 8×8 grid, so 64 positions with no traditional reels. -
What does the Jam Jar symbol do?
The Jam Jar is both a wild and a scatter. It substitutes for all other symbols, carries a multiplier that starts at 1x and grows by one each time it helps form a win, hops to an adjacent position after contributing, and is held in place during collapses. Three or more of them trigger the Free Games Feature. -
How do you trigger the Free Games Feature in Jammin Jars?
Land three or more Jam Jar symbols anywhere on the grid and you’re awarded six free games. There’s no retrigger, so those six spins are the round. -
What is the maximum win on Jammin Jars?
The maximum win is 20,000x your bet. -
What is the minimum and maximum bet on Jammin Jars?
Bets run from 0.2 to 100 per spin.
