Slots Like Jammin’ Jars: Two Games and a 1-in-1.3-Million RNG Mystery
Jammin’ Jars is Push Gaming‘s disco-soaked cluster-pays hit, the game that helped prove an 8×8 grid stuffed with dancing jam jars and cascading fruit could compete with the reel-spinner mainstream. If you’re searching for slots like Jammin’ Jars, only two genuine entries exist in this family, the 2018 original and 2021’s glossier, higher-ceiling Jammin’ Jars 2, and this page compares them honestly, including a real RNG-fairness story from the original’s early days that’s worth knowing before you play. If you’re after Push Gaming’s other big series, our Razor Shark family guide covers that separately; the two studios’ games are unrelated beyond sharing a developer.
Where to Play Jammin’ Jars Slots
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Reviewed by Brian TaylorPublished: August 2026
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Both Jammin’ Jars Games at a Glance
Both Push Gaming, both built on the same 8×8 cluster-pays skeleton, figures checked 6 July 2026:
| Game | Year | Grid | RTP | Max win |
|---|---|---|---|---|
| Jammin’ Jars | 2018 | 8×8, cluster pays | 96.83% | 20,000x |
| Jammin’ Jars 2 | 2021 | 8×8, cluster pays | 96.40% | 50,000x |
Both ship in certified reduced-RTP builds depending on the operator. Note: a related title called Giga Jar: Cluster Link (2023) reuses Jammin’ Jars 2’s “Giga Jar” mechanic but is a separately branded Push Gaming release, it is not “Jammin’ Jars 3” and isn’t part of this family.
Every game, reviewed
1. Jammin’ Jars
Released 14 September 2018, Jammin’ Jars runs on an 8×8 grid with cluster pays instead of paylines, land 5 or more matching fruit symbols adjacent to each other and they cascade away, dropping new symbols in from above for a chance at consecutive wins on a single spin. The standout mechanic is the Wild Jam Jar: a sticky wild that appears mid-cascade, moves randomly to a new position after each drop, and gains +1x every time it contributes to a win, so a long cascade chain can turn one jar into a serious multiplier. Land 3 or more Jam Jars and you trigger Funky Free Games, 6 spins where any jars that triggered the round stay locked in place for its duration. A separate random Rainbow Feature can also fire after a non-winning cascade, dropping 1-3 giant fruit symbols onto the grid to force another look. Published at 96.83% RTP by default, High volatility, and a 20,000x max win (some sources cite the precise engine cap as 19,998.5x, a rounding detail rather than a real disagreement).
2. Jammin’ Jars 2
Released 2 June 2021, Jammin’ Jars 2 keeps the same 8×8 cluster-pays core and Wild Jar mechanic, then builds a whole new layer on top with a DJ host character presiding over a glossier, neon-lit disco nightclub reskin. A collectible Gold Vinyl meter fills as you play, climbing through 5 levels that each boost the game’s in-game RTP (a figure of 96.60% you’ll see quoted around the web is this in-game ceiling, not a separate operator-selectable RTP tier). New Instant Prize symbols, framed in blue, can pay up to 1,000x in a single 5+ cluster, and a random Fruit Blast feature fires 1-3 giant fruit shots much like the original’s Rainbow Feature. The headline addition is Giga Jar: reach the DJ meter’s maximum level and the grid clears entirely for 8 Giga Spins, played out on expanding 2×2, 3×3 and 4×4 instant-prize blocks. It’s a substantially higher-ceiling game as a result, with a published max win of 50,000x against the original’s 20,000x.
Jammin’ Jars: quick facts
| Provider | Push Gaming |
|---|---|
| First released | 14 September 2018 |
| Layout | 8 reels × 8 rows, cluster pays |
| RTP | 96.83% (reduced builds down to 90.45%) |
| Volatility | High |
| Max win | 20,000x |
| Signature feature | Wild Jam Jar, sticky wild that moves each cascade and gains +1x per contributing win |
✓ Facts checked 6 July 2026
The maths: a real jump in ceiling by the sequel
What a hundred £1 spins costs at each game’s default published RTP:
| Game | House edge | £1 × 100 spins |
|---|---|---|
| Jammin’ Jars (96.83%) | 3.17% | £3.17 |
| Jammin’ Jars 2 (96.40%) | 3.60% | £3.60 |
✓ Calculated from the published RTPs, checked 6 July 2026
The original edges the sequel slightly on default RTP, but Jammin’ Jars 2’s Gold Vinyl mechanic can push its effective in-game RTP higher the longer a session runs, and its 50,000x ceiling is more than double the original’s. For other studios’ takes on the cluster-pays format, see our slot features hub. Session tools on our Responsible Gambling page.
History and legacy
Push Gaming built Jammin’ Jars in 2018 at a time when most UK slot studios were still leaning heavily on payline reel-spinners, and its 8×8 cluster-pays disco format helped push the whole cluster genre into the mainstream. Three years later, Jammin’ Jars 2 kept the winning core mechanic intact and layered on a genuinely new endgame in Giga Jar, giving the sequel a much higher ceiling without abandoning what made the original click. That same Giga Jar mechanic would later headline its own standalone spin-off, Giga Jar: Cluster Link, in 2023, evidence the format still had more to give even outside this specific family.
Why this family still matters
Jammin’ Jars proved cluster pays could be a mainstream UK hit rather than a niche mechanic, and Jammin’ Jars 2 showed a sequel could raise the ceiling substantially while keeping the exact same core loop that made the original work.
Beyond the reels
Both games are part of Push Gaming’s wider catalogue, a studio also behind the Razor Shark family, Fat Rabbit, Wild Swarm and Big Bamboo. Push Gaming holds an active UK Gambling Commission licence, and both Jammin’ Jars titles are broadly available across UKGC-licensed operators including Casumo, LeoVegas, BetUK and SlotBoss.
What players say
Players consistently rate Jammin’ Jars 2 as the better all-round experience, the DJ presentation and Gold Vinyl progression give sessions a sense of building toward something, and Giga Jar is widely cited as one of the most satisfying bonus payoffs Push Gaming has built. The original still has loyal fans who find its simpler, no-frills cluster loop faster-paced and less distracted by extra systems.
The identical-wins story
We couldn’t find a specific, verifiable single biggest cash-win record for either game, no named player, date or confirmed amount that multiple sources agree on, so we’re not publishing one. What is genuinely documented, and reported by BigWinBoard at the time, is a stranger story from shortly after Jammin’ Jars launched in 2018: two separate pairs of Twitch streamers landed identical 1660.15x wins through matching bonus-round sequences, odds commentators estimated at around 1-in-1.3-million. Push Gaming responded publicly, explaining the game’s RNG draws its bonus outcomes from a large pre-generated pool rather than generating each round from scratch, which is how two unrelated sessions could land the exact same result. It’s a genuinely interesting footnote on how the game’s randomness works, even without a single headline jackpot to report.
The Best Jammin’ Jars Slot: Original or Sequel?
| If you want… | Play | Why |
|---|---|---|
| The original, simpler cluster-pays loop | Jammin’ Jars | Slightly higher default RTP, no extra meters to track |
| The bigger ceiling and more going on | Jammin’ Jars 2 | 50,000x cap, Gold Vinyl progression, the Giga Jar endgame |
Our verdict on Jammin’ Jars
SlotsLike score: 8/10, a genre-defining cluster-pays original with a sequel that raised the ceiling without losing the plot.
| Features | 8/10, Wild Jam Jar’s cascading multiplier and Giga Jar’s grid wipe work on completely different logic, not just different art |
|---|---|
| Win potential | 8/10, 50,000x on the sequel is a serious ceiling |
| Design | 8/10, disco theming that’s aged well, sharpened further in JJ2 |
| Playability | 8/10, the cascades keep coming fast enough that a session never feels slow |
Play here if you want one of the genre-defining cluster-pays slots with a real choice between simplicity and a bigger ceiling. Look elsewhere if you specifically want Push Gaming’s reel-spinner side, that’s a separate family entirely.
Jammin’ Jars FAQs
Who makes Jammin’ Jars?
Push Gaming, the same studio behind the Razor Shark family, Fat Rabbit and Big Bamboo.
How many Jammin’ Jars games are there?
Two genuine entries: Jammin’ Jars (2018) and Jammin’ Jars 2 (2021). There is no “Jammin’ Jars 3”, Giga Jar: Cluster Link (2023) reuses a mechanic from JJ2 but is a separately branded release.
What is the RTP of Jammin’ Jars?
96.83% by default, with reduced builds available down to 90.45%.
Which game has the bigger max win?
Jammin’ Jars 2, at 50,000x, versus the original’s 20,000x.
What is the Wild Jam Jar feature?
A sticky wild that moves to a new position after each cascade and gains +1x every time it contributes to a win.
What is Giga Jar in Jammin’ Jars 2?
A marquee feature unlocked at the Gold Vinyl meter’s maximum level, it clears the grid for 8 Giga Spins played on expanding 2×2, 3×3 and 4×4 instant-prize blocks.
Is Giga Jar: Cluster Link part of this franchise?
No. It’s a separately branded 2023 Push Gaming release that reuses the Giga Jar mechanic, not a third Jammin’ Jars entry.
Are these slots fair?
Yes, Push Gaming holds an active UK Gambling Commission licence with independently tested RNGs. A 2018 incident where two pairs of streamers landed identical 1660.15x wins was publicly explained by Push Gaming as a result of its RNG drawing from a large pre-generated outcome pool, not a fault.
Sources & Verification
Primary sources checked 9 July 2026: Push Gaming’s own corporate site; and the UK Gambling Commission’s public register (Push Gaming Holding Plc, account 54984).