Push Gaming slots are made by a London-based studio founded in 2010, now majority-owned by LeoVegas Group, and best known for Jammin' Jars, Razor Shark and Big Bamboo. This page explains the studio’s signature mechanics, why its published max wins run as high as 100,000× the stake, how its two-RTP habit affects what you pay, and how to check its UK licence.
Push Gaming is one of the few online slot studios with its headquarters in Britain. It was founded in 2010, is based in London and also has an office in Ta' Xbiex, Malta. James Marshall is a co-founder. Its UK licence is held by Push Gaming Holding Limited under Gambling Commission account 054984.
The catalogue is smaller than the output of the volume studios in our online slot providers hub, and it leans heavily towards high volatility. That makes Push a useful case study in how a studio’s maths choices, rather than its themes, define what playing its games feels like.
Push Gaming ownership: LeoVegas and MGM Resorts
In May 2023, LeoVegas Group announced that it was taking a majority stake in Push Gaming. LeoVegas is itself part of MGM Resorts, the American casino company. That makes Push one of the studios owned by a group that also runs casinos, rather than by a pure games supplier.
For players, ownership doesn’t change how a game is tested or how its RTP is calculated; the same Gambling Commission standards apply. It can affect which casinos list the games over time, so the reliable approach is to search the lobby where you play. Our explainer on what a slot aggregator is shows how studio games reach many casinos at once.
Jammin' Jars plays on an 8 × 8 grid where five or more touching symbols win, the system described in our guide to cluster pays slot machines. Its jars act as wilds and are central to the multipliers, and winning symbols are cleared and replaced so one spin can chain several wins.
Mystery stacks and nudges
Razor Shark is built around stacks of hidden symbols that are revealed after the reels stop, and its sequel Razor Returns adds a Nudge & Reveal feature plus free spins that can start with multipliers of up to 25×. The mystery symbol idea is explained in our page on mystery symbols.
Growing wild characters
The ‘Fat’ series, which includes Fat Rabbit and Fat Santa (both 2018, 96.45% default) and Fat Banker (2022), is built on 50-line grids with a wild character that grows during the bonus. Bigger wilds cover more positions, so they touch more lines at once; our guide to expanding wilds shows the effect on a grid.
Why Push Gaming max wins are so high, and what they mean at UK stakes
Push publishes some of the largest caps in our data. A high cap is not a promise; it tells you the maths keeps a slice of the return for very rare, very large results, which is why the base game can feel quiet for long stretches. Razor Shark is a special case: published listings treat its top payout as uncapped in theory, so we don’t state a figure.
Push Gaming RTP: two versions of nearly every game
Most Push titles in our data publish a default RTP alongside at least one lower setting. The difference looks small on paper but adds up over a session. The table shows the long-run average cost of £100 staked at each setting.
Default vs lower RTP versions: average cost per £100 staked
Slot
Default RTP
Cost per £100
Lower version
Cost per £100
Big Bamboo
96.13%
£3.87
94.13%
£5.87
Fat Santa
96.45%
£3.55
94.15%
£5.85
Fat Rabbit
96.45%
£3.55
94.15%
£5.85
Fat Banker
96.43%
£3.57
94.45%
£5.55
Retro Tapes
96.47%
£3.53
94.46%
£5.54
Put another way, on the lower Big Bamboo setting you would expect to lose about 50% more over the long run for the same play. That is why it is worth knowing which version your casino runs. Our explainer on RTP variants covers how casinos choose.
How to check a Push Gaming slot’s RTP and rules
Load the game at the casino; free demo play is only available after age verification in Great Britain.
Open the menu and choose the game info or rules page.
Scroll to the return to player statement and note whether it gives one figure or a range.
For Jammin' Jars 2, read how the published range of 96.1% to 96.6% applies.
Note the maximum win stated in the rules, which can differ from casino terms.
Push Gaming’s UK licence and other regulators
Push Gaming Holding Limited holds Gambling Commission account 054984, which you can look up on the register of gambling businesses (opens in a new tab). The group is also licensed in Malta (MGA/B2B/779/2020), Ontario and Romania.
British players get versions shaped by the 31 October 2021 design changes. Spins must be started by hand, last 2.5 seconds or more and can’t be skipped with turbo or slam-stop; a return no bigger than the stake gets no win fanfare; and your balance and net position remain on screen. Each rule is listed in our guide to UK slot game design rules. The paid bonus shortcut found abroad is also missing from these versions.
Push Gaming myths and the facts
‘A 100,000× cap means the game pays more.’ The cap is the ceiling for a rare outcome; the RTP is what tells you the average return.
‘Mystery stacks show what’s coming next.’ They reveal a result already decided by the RNG when you pressed spin.
‘If the jars haven’t landed for a while, they will soon.’ Every spin is independent; past spins have no influence, as explained in the gambler’s fallacy.
‘British studios set looser games for UK players.’ RTP is set per version, not per country of the studio, and the casino chooses the version.
Are Push Gaming slots worth it? Who they suit
Advantages
Distinctive mechanics: jar wilds, mystery stacks, growing wilds
Default RTPs between 96.1% and 96.83% in our data
Very high caps for players who accept the risk
UK-headquartered studio with a Gambling Commission licence
Drawbacks
Almost every title is high volatility, with long quiet spells
Lower RTP versions are common, so the cost varies by casino
Razor Shark has no published fixed max win
Losses are likely over time, as with all slots
Push games suit players who want big-swing sessions and plan their budget around long gaps between features. If you prefer a steadier experience, Mount Magmas is the medium-volatility option. Before trying any of them, read our guide to high volatility slot machines and set a limit using the slot safer gambling tools your casino offers.
Where to play Push Gaming slots in the UK
Push Gaming’s range at any one casino isn’t something we can confirm, as lobbies change often. Search by game name at Coral, Ladbrokes or PlayOJO to see what is currently live.
The offers below aren’t tied to Push Gaming. Coral: new customers who deposit and bet £10 on slots get 100 free spins, 10p each on selected games, valid for 7 days. Ladbrokes: spend £10 on slots for 50 free spins a day over 10 days (up to 500), 10p each on selected games. PlayOJO: 80 no-wagering free spins on Big Bass Bonanza after a first deposit of £10 or more. 18+, new customers only, and terms apply.
Coral and Ladbrokes are both run by LC International Limited (Entain). If you already hold an account with one Entain brand, you may not be able to open a new account with another; check the terms before signing up.
Significant terms: 18+. New players only. Offer runs 01/10/2026 to 01/02/2027. Deposit (certain types excluded) and bet £10+ on slot games to get 100 free spins (selected games, £0.10 each, 48 hrs to accept, valid 7 days). No wagering on free spin winnings. Deposits by Neteller, PayPal, Paysafe, Skrill, prepaid cards and certain debit cards do not qualify. Restrictions and T&Cs apply. GamCare.org.uk
Read the Coral reviewLicence: LC International Limited, UKGC account 54743. Offer checked 5 October 2026.
Significant terms: 18+. New customers only, from 14/11/25 until further notice. Certain deposit methods excluded. Deposit and spend £10+ on slots for 50 free spins a day during the first 10 days after first deposit and registration (max 500, £0.10 each, selected games, claim before 23:59 each day, valid 7 days). No wagering. Prepaid cards, PayPal, Paysafe, Neteller, Skrill and Moneybookers deposits do not qualify. Restrictions and T&Cs apply. GamCare.org.uk
Read the Ladbrokes reviewLicence: LC International Limited, UKGC account 54743. Offer checked 5 October 2026.
Significant terms: 18+. New UK customers (excluding Northern Ireland). First deposit only. Minimum deposit £10. 80 free spins on Big Bass Bonanza, £0.10 each. No wagering requirements; winnings paid in cash. Cannot be used with any other offer. Only available to players who arrive through the designated offer link. Full T&Cs apply. GamCare.org.uk
Read the PlayOJO reviewLicence: Skill On Net Limited, UKGC account 39326. Offer checked 5 October 2026.
18+. Gambling should be entertainment that costs money, not a way to make it. Decide a budget before you play: plan a slot budget. Free, confidential help: National Gambling Helpline 0808 8020 133.
Frequently asked questions
Who owns Push Gaming?
LeoVegas Group announced a majority stake in Push Gaming in May 2023, and LeoVegas is part of MGM Resorts. Push was founded in 2010 and co-founded by James Marshall. It remains headquartered in London, with an office in Ta' Xbiex, Malta. Ownership details can change, so the Gambling Commission’s public register is the place to confirm current licence holders. Our explainer on who makes online slots shows how studios and casino groups connect.
Is Push Gaming a UK company?
Yes, in the sense that it is headquartered in London, and its UK licence is held by Push Gaming Holding Limited under Gambling Commission account 054984. It also has an office in Malta and holds licences in Malta, Ontario and Romania. Its majority owner, LeoVegas Group, is part of the American company MGM Resorts. What the licence covers for players is set out in our guide to the Gambling Commission and slots.
What is Push Gaming’s most popular slot?
Jammin' Jars, Razor Shark and Big Bamboo are the studio’s best-known games. Without reliable play statistics, naming one most-played title would be guesswork. All three are rated high volatility: Jammin' Jars is a cluster game with a 96.83% RTP and 20,000× cap, while Big Bamboo uses 50 paylines with a 50,000× cap. Our Jammin' Jars page explains the jar wilds step by step.
What is the max win on Razor Shark?
Push doesn’t publish a fixed cap for Razor Shark; reference listings treat the top payout as uncapped in theory, so we don’t quote a figure. Its sequel, Razor Returns (2023), lists a 100,000× cap, which would be £500,000 at the £5 UK stake limit, though casinos may also apply their own maximum payout terms. Reaching anything near either ceiling is extremely rare. Our Razor Shark page covers the mystery stacks feature.
Why do Push Gaming slots have two RTPs?
Push supplies most games at a default RTP and at least one lower setting, and each casino chooses which to offer. Big Bamboo, for example, comes at 96.13% or 94.13%. On the lower setting the long-run average cost is £5.87 per £100 staked rather than £3.87. The game otherwise plays identically. Our guide to finding a slot’s RTP shows how to see which version you are playing.
What does ‘96.1% rising to 96.6%’ mean on Jammin' Jars 2?
It means the published return isn’t a single number in the default version; the figure rises from 96.1% to 96.6% under conditions explained in the game’s rules. We don’t hold the detail of how the range applies, so read the help screen before you play. Either way, the cost over the long run is between about £3.40 and £3.90 per £100 staked. Our Jammin' Jars 2 page covers the sequel’s features.
Are Push Gaming slots high volatility?
Mostly, yes. Almost every Push title in our checked data is rated high, with Mount Magmas the medium-volatility exception and Fat Santa listed as medium to high. High volatility means wins are less frequent and more uneven: a session can return very little for a long time and then pay a larger amount. It doesn’t change the average cost. Our guide to slot volatility explains how studios shape it.
Are Push Gaming slots fair?
Push titles cleared for British casinos have been through independent lab testing against the Commission’s standards, covering the random number generator and whether the game pays out exactly as its rules state. A clean test result means honest, not profitable: whatever the cap on Jammin' Jars or Razor Returns, the long-run maths favours the casino and players lose on average. More on what the labs examine is in the fairness checks on slots.
Can I use bonus buy on Push Gaming slots?
Not at British casinos. Push supplies its UK builds without a paid shortcut, so the free spins in Big Bamboo or Razor Shark only begin when the trigger lands on a standard spin. Foreign builds sometimes sell entry outright. Since we can’t find a dated Commission rule prohibiting that, the accurate description is a supply practice for Great Britain rather than a ban. Our bonus buy in the UK page sets out what is known.
Gambling can be addictive. Free, confidential help is available 24 hours a day from the National Gambling Helpline on 0808 8020 133. Visit GamCare.org.uk and GamCare, or block yourself from all UK-licensed gambling sites with GAMSTOP.
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