Jammin' Jars - Play Ojo Casino
Push Gaming cluster slot on an 8x8 grid Top RTP 96.83% · high volatility · released 2018
Jammin' Jars is Push Gaming's 8x8 cluster slot where jam jars act as wilds with multipliers. The top RTP is 96.83%, volatility is high and the highest observed win is 19,998.5x.
Game at a glance
- Top RTP 96.83%, lower build 94.25%
- Highest observed win 19,998.5x
- Released by Push Gaming in 2018
Jammin' Jars at PlayOJO in one look
Jammin' Jars is a Push Gaming cluster slot on an 8x8 grid. Match five or more fruits to win, and let the jam jars add wilds and multipliers. Push lists two RTP builds, 96.83% and 94.25%, high volatility and a 19,998.5x top win.
- Provider
- Push Gaming
- Released
- 2018
- Grid
- 8x8, cascading
- Wins
- Clusters of 5+
- Special symbol
- Jam Jar: wild and scatter
- RTP builds
- 96.83% / 94.25%
- Volatility
- High
- Highest observed win
- 19,998.5x
- Bonus Buy
- Offered by the studio
It came out in September 2018 and it still sits in plenty of "favourite slot" lists, mostly because nothing else looks quite like it. There are no reels and no paylines in the usual sense, just a dance floor of fruit that keeps collapsing and refilling while the jars bounce around. If you've played Gates of Olympus, the tumbling feels familiar, but here the multipliers live on a symbol you can watch move rather than dropping in from above.
How the 8x8 grid pays
Every spin fills 64 squares with fruit and, now and then, a jam jar. A win needs five or more matching fruits touching each other horizontally or vertically. Winning clusters vanish, new symbols fall into the gaps, and the next cluster can form without another bet. One spin can run for a while when the drops keep lining up.
- The grid fills
Fruits and the odd jam jar land on all 64 squares.
- Clusters pay
Five or more matching fruits side by side make a win.
- Symbols cascade
Winners disappear and fresh symbols drop in for free.
- Jars join in
A jar next to a cluster acts as wild and adds its multiplier.
The jam jar is the whole personality of the game. Push Gaming describes it as both a wild and a scatter, and every jar carries its own multiplier that starts at 1x and applies to every win it helps build. In the studio's launch note, the jars "jive across the dance floor with every win" while their multipliers grow, and multiplied wins "can be multiplied again and again". In practice that means a jar that stays in play through a long cascade is the one you want to keep an eye on.
Jammin' Jars demo: what free play teaches you
Push Gaming's own game page for Jammin' Jars has a Play Game button, and a demo is the cheapest way to learn the rhythm of an 8x8 grid. Give it a proper run of a few hundred spins rather than ten. High-volatility slots can go quiet for long stretches, and a short demo session tells you very little about that.
What the demo shows well
- How clusters form and how long cascades can run
- How jars move and how their multipliers climb
- What the Rainbow feature and Free Games look like
- Which stake size feels right for your balance
What to check in real play
- The RTP build the casino runs, on the loading screen
- Your own deposit limit, set before the first spin
- That OJOplus money back only counts real-money bets
- That demo streaks don't carry into a real session
At PlayOJO, whether a free-play mode shows on the tile depends on the lobby and on your login, so if you don't see one, the studio's own page is the easy fallback.
Max win: what 19,998.5x means in euro
Push Gaming lists 19,998.5x the stake as the highest observed win on Jammin' Jars. That's the top figure the studio has seen, which gives you a realistic ceiling to think about rather than a promise. It needs several jars with fat multipliers touching the same big cluster, and that's exactly why it's rare.
- €1,999.85at a €0.10 spin
- €19,998.50at a €1 spin
- €39,997at a €2 spin
Big wins at PlayOJO are paid as cash, and withdrawals go out up to €5,000 per transaction and €10,000 per 30 days, so a win at the top end simply arrives in stages. There's no minimum withdrawal, which helps just as much at the other end of the scale when a cluster pays a few euro.
Jammin' Jars RTP and volatility
Push Gaming publishes two RTP versions for the game and notes that the RTP may vary per casino. The number is shown in the user panel and on the game's loading screen, so it takes five seconds to check at PlayOJO before you commit to a stake.
| Version | RTP | House edge | Back per €100 |
|---|---|---|---|
| Top build | 96.83% | 3.17% | €96.83 |
| Lower build | 94.25% | 5.75% | €94.25 |
The last column is the long-run average return for every €100 staked, not what one session pays. The gap between the builds looks small, but over a thousand €1 spins it's roughly €26 of expected difference. Volatility is rated high by the studio: long runs of small or no wins, then the occasional cascade that makes up for them. The simulator below shows how far a balance stretches at each build.
Bonus features: jars, free spins and the Rainbow
There isn't a long list of extras, and that's part of the charm. Everything turns on the jars, with one random feature on top to rescue a dry spin.
Jam Jar wilds
Each jar is wild and scatter at once. Its multiplier starts at 1x and applies to every win the jar joins.
Free Games
Three or more jars anywhere on the grid start the feature, where the jars dance and multipliers join in.
Rainbow feature
It triggers at random and drops giant fruits onto the floor that burst into wins.
Bonus Buy
Push Gaming lists a Bonus Buy for the game. Whether the button shows depends on the casino and market.
The Free Games are where the big numbers come from, because the jars keep working across several spins instead of one cascade. The in-game paytable shows how many free spins your build awards and how the jars behave during the round, so it's worth one look before you chase the feature. Just remember the PlayOJO welcome spins go on Big Bass Bonanza, so Jammin' Jars free games come from the jars themselves.
Where to play Jammin' Jars: PlayOJO
Push Gaming is one of the studios in PlayOJO's Irish lobby, next to Pragmatic Play, Play'n GO and Evolution among 4,000+ games. PlayOJO launched in 2017, runs under Malta Gaming Authority licence MGA/CRP/171/2009, and the whole site runs on one idea: no wagering on any reward. You can read how the rest of the casino holds up in our PlayOJO review.
- Open an account
Sign up if you're 18 or over, and join PlayOJO here to land straight on the Irish site.
- Set your limits
OJO Safeguard lets you set daily, weekly or monthly deposit limits before the first euro goes in.
- Deposit €10 or more
Pay by debit card or another listed method. Your first deposit also brings 50 no-wagering spins on Big Bass Bonanza.
- Search the lobby
Type "Jammin" in the lobby search, open the tile and check the RTP on the loading screen.
Tip: OJOplus pays money back on every real-money bet as cash, and that includes each Jammin' Jars spin. On a high-volatility slot, that steady trickle softens the quiet stretches between big cascades.
Jammin' Jars also runs in the mobile browser and in the PlayOJO apps for iOS and Android, and an 8x8 grid fits a phone screen better than you'd expect. If you want a wider pick first, the top games on our homepage are a good place to start. Need to talk to someone about your play? Gambling Care offers free, confidential support in Ireland.
Before and after: Jammin' Jars vs Jammin' Jars 2
Push Gaming released the sequel in June 2021 and kept the 8x8 grid, the five-fruit clusters and the jars. What changed is everything around them: a DJ, a collection meter and a lot more going on per spin. The original is leaner, has the higher top RTP and is easier to read, while the sequel trades that for a bigger ceiling. Not sure which suits you? try both at PlayOJO and compare the rhythm yourself.
Before: Jammin' Jars (2018)
- 8x8 cascading grid, clusters of 5+ fruits
- Jam Jars are wild and scatter, multipliers from 1x
- Free Games from 3+ jars
- Random Rainbow feature with giant fruits
- RTP 96.83% or 94.25%
- Highest observed win 19,998.5x
After: Jammin' Jars 2 (2021)
- 8x8 grid, clusters of 5+ fruits
- Gold Vinyls fill a meter towards the Giga Jar
- Instant Prizes worth up to 1,000x
- Fruit Blast fires 1-3 shots of giant fruit
- 6 Free Spins from 3+ Wild Jars, 8 Giga Spins
- RTP 96.40% or 94.40%, highest observed win 50,000x
Jammin' Jars questions OJOers ask
Push Gaming publishes two versions: 96.83% and 94.25%. The studio says the RTP can vary by casino, so open the game at PlayOJO and read the figure on the loading screen or in the info panel before you set your stake.
Push Gaming's own game page has a Play Game button for a free look, and some casino lobbies show a demo mode too. Use it to learn how the jars move and how often clusters land, then switch to real money only with a budget you've set.
Push Gaming lists the highest observed win as 19,998.5x the stake. On a €1 spin that's €19,998.50, on a €0.20 spin it's €3,999.70. Hits that size are rare, because the game is rated high volatility.
Land three or more jam jars anywhere on the grid and the Free Games feature starts. The in-game paytable shows the exact spin count for the build you're playing. The PlayOJO welcome spins are on Big Bass Bonanza, not on this slot.
Yes. OJOplus returns money on every real-money bet at PlayOJO and pays it as cash, with no wagering attached, so it covers Jammin' Jars spins like any other game.
The original is simpler: clusters, jar multipliers and a random Rainbow feature, with a 96.83% top RTP. The 2021 sequel adds Gold Vinyls, Instant Prizes and the Giga Jar, with a 96.40% top RTP and a 50,000x highest observed win.
Put the jars on the dance floor at PlayOJO
Your first deposit of €10 or more brings 50 free spins on Big Bass Bonanza with no wagering, and Jammin' Jars is one lobby search away after that.
Welcome offer
50 free spins, no wagering
Big Bass Bonanza · first deposit · min €10 · 18+ T&Cs apply
Last updated · Reviewed by Michael Roberts, Casino Expert · Facts checked · First published