Push Gaming slots have a recognisable feel. Mystery symbols land in stacks and nudge down the reels, multipliers climb during free spins, and the volatility is almost always high. The London studio behind Razor Shark and Jammin’ Jars now lists 90 game pages on its website, yet a handful of titles still carry most of its reputation.
Below are the six Push Gaming slots people ask about most, with every RTP, grid, feature name and highest observed win checked against the studio’s own pages at pushgaming.com.
Who Is Push Gaming?
James Marshall and Winston Lee founded Push Gaming in 2010. The company is headquartered in London with a second office in Ta’ Xbiex, Malta. Push Gaming Malta Ltd holds a Critical Gaming Supply licence from the Malta Gaming Authority, number MGA/B2B/779/2020, and Push Gaming Holding Limited is licensed by the Gambling Commission in Great Britain under account number 054984.
In May 2023, LeoVegas Group, a subsidiary of MGM Resorts International, agreed to buy a majority stake in the studio, and the deal completed later that year. Management stayed in place, with Marshall as CEO and Lee as COO.
What Makes Push Gaming Slots Different?
A few mechanics recur across the catalogue, so it helps to learn them once.
Mystery Stacks and Nudge & Reveal. Mystery symbols land in stacks, nudge down one position at a time and reveal paying symbols, wilds or special symbols as they go. Razor Shark, Razor Returns, Big Bamboo and Mystery Museum all use a version of this.
Progressive free spin multipliers. In the Razor games, every nudge during free spins adds 1 to the total multiplier, so long free spin rounds are where the headline wins come from.
Highest observed win, not max win. Most game pages publish a “highest observed win” instead of a theoretical cap. Treat it as the biggest result recorded so far, not a promise.
Two or more RTP versions. Each game page lists at least two RTP settings, usually one around 96.5% and one around 94%. The casino chooses which to run, and the game shows the active value on its loading screen and in the user panel. All RTP figures here are the default (highest) published versions.
Bonus Buy and Push Bet. Most newer titles offer a Bonus Buy into free spins. Razor Returns also has Push Bet, which raises the base bet by 10% for a higher chance of triggering free spins. Availability varies by casino and market.
All six games below are rated High volatility on the official pages. The spin-offs Razor Shark Jackpots (Medium) and Razor Nudge (Low) are the exceptions in the range.
Six Push Gaming Slots Explained
Razor Shark
Released in August 2019, Razor Shark is the studio’s best-known title and the template for most of what followed.
Key Features
- Format: 5 reels, 4 rows, 20 paylines
- Published RTP: 96.70% (also 94.06%)
- Volatility: High
- Mystery Stacks: seaweed stacks of four land anywhere and trigger Nudge & Reveal
- Razor Reveal: golden shark symbols turn mystery positions into mini-reels paying instant bet multipliers from 1x to 2,500x, or scatters
- Free Games: 3 or more scatters; reels 2 and 4 fill with mystery symbols that nudge down each spin, raising the multiplier every time
- Highest observed win: not listed on the official page
This is the cleanest version of the mystery stack idea, and the free spins round keeps going while fresh scatters keep landing. The official page lists no Bonus Buy, so the feature has to be reached the slow way.
Razor Returns
The July 2023 sequel, Razor Returns, keeps the underwater setting and expands almost everything else.
Key Features
- Format: 5 reels, 5 rows, 40 paylines
- Published RTP: 96.55% (also 94.49%)
- Volatility: High
- Scatters: Torpedo symbols; 3 or more trigger Free Spins, even mid Razor Reveal
- Razor Reveal: adds Instant Prize, Multiplier, Collector, Converter and Nudge Up symbols
- Free Spins: mystery symbols fill reels 2 and 4 and add 1 to the Total Multiplier per nudge; extra scatters start the round at a higher multiplier
- Bonus Buy: several options, including a full screen of Razor Reveal symbols
- Push Bet: +10% on the base bet for a higher trigger chance
- Highest observed win: 100,000x
Collector and Converter symbols turn Razor Reveal into a bonus in its own right, and the published ceiling is the biggest of the six games here. The flip side is long gaps between features, so budget for them.
Jammin’ Jars
Launched in September 2018, Jammin’ Jars swaps paylines for an 8×8 grid and a disco soundtrack.
Key Features
- Format: 8×8 grid, cascading wins from clusters of 5 or more matching symbols
- Published RTP: 96.83% (also 94.25%)
- Volatility: High
- Jam Jars: both wild and scatter, each with its own multiplier that starts at 1x and applies to every win the jar is part of
- Free Games: 3 or more Jam Jars anywhere
- Rainbow Feature: random, drops giant fruit symbols onto the grid
- Bonus Buy: available
- Highest observed win: 19,998.5x
Of the six, it has the highest default RTP and a different rhythm from the Razor games. In free games the whole aim is to keep more than one jar in play, and wins build in steps rather than one spike.
Big Bamboo
Big Bamboo arrived in March 2022 and is the most feature-dense game here.
Key Features
- Format: 5 reels, 6 rows, 50 paylines
- Published RTP: 96.13% (also 94.13%)
- Volatility: High
- Gamble Scatter: lands on reels 2, 3 and 4 and spins through different results in place
- Mystery Stacks: in the base game and free spins, revealing wilds, paying symbols or the Golden Bamboo symbol
- Golden Bamboo Feature: one respin with Instant Prizes up to 5,000x, Multipliers up to 10x, Scatters, Gamble Scatters or Collectors
- Free Spins: spins plus Symbol Conversions, which you keep or gamble on the Gamble Wheel
- Bonus Buy: available
- Highest observed win: 50,000x
The Gamble Wheel adds a decision most slots never offer. You either keep the free spins you’ve been given or risk them for a version with more low symbols converted into bamboo.
Fat Rabbit
A 2018 release, Fat Rabbit is built around a single growing character.
Key Features
- Format: 5 reels, 5 rows, 50 paylines
- Published RTP: 96.45% (also 94.15%)
- Volatility: High
- Free Games: a rabbit plus a wild carrot triggers them; the rabbit collects every wild carrot that lands, filling a meter, growing and adding free spins
- Harvest Feature: random; a tractor ploughs through the reels and unearths several wild carrots
- Bonus Buy: available
- Highest observed win: 3,844x
Its ceiling is the lowest of the six by some distance, and its rules are the easiest. That makes it a sensible first title from the studio, as long as you know it is still rated High volatility.
Mystery Museum
Released in August 2020, Mystery Museum takes the mystery stack mechanic onto a compact ten-line grid.
Key Features
- Format: 5 reels, 3 rows, 10 paylines
- Published RTP: 96.58% (also 94.01%)
- Volatility: High
- Power Gamble: on wins above 2x, pick one of three gamble options to work towards free games or a larger cash win, worth at least 100x at the top
- Free Games: 3 or more samurai scatters award 8 to 12 free spins
- Sticky Mystery Stacks: in free games the stacks stay put and only reveal when a win is possible
- Nudge & Reveal: triggered by 3 or more mystery stacks anywhere
- Highest observed win: 17,500x
- Bonus Buy: listed as coming soon on the official page
The small grid feels old-school, but sticky stacks in free games change the maths. If you like a choice after a win, Power Gamble gives you one.
Push Gaming Slots Compared
| Game | Released | Grid and lines | Default RTP | Volatility | Highest observed win | Bonus Buy |
|---|---|---|---|---|---|---|
| Razor Shark | Aug 2019 | 5×4, 20 lines | 96.70% | High | Not listed | Not listed |
| Razor Returns | Jul 2023 | 5×5, 40 lines | 96.55% | High | 100,000x | Yes, plus Push Bet |
| Jammin’ Jars | Sep 2018 | 8×8 cluster pays | 96.83% | High | 19,998.5x | Yes |
| Big Bamboo | Mar 2022 | 5×6, 50 lines | 96.13% | High | 50,000x | Yes |
| Fat Rabbit | 2018 | 5×5, 50 lines | 96.45% | High | 3,844x | Yes |
| Mystery Museum | Aug 2020 | 5×3, 10 lines | 96.58% | High | 17,500x | Coming soon |
Data from pushgaming.com, October 2026; Razor Returns and Big Bamboo grids from independent reviews.
Which Push Gaming Slot Should You Choose?
For the biggest published ceiling, Razor Returns is the obvious pick, and Push Bet trades a higher cost per spin for more frequent features. If RTP comes first, Jammin’ Jars edges the others at 96.83% and its cluster format builds wins in smaller steps.
Big Bamboo suits people who enjoy decisions between spins. Fat Rabbit and Mystery Museum are easier entry points for online slot beginners, with simpler rules and smaller highest observed wins. Razor Shark remains the reference point; play it once and every other mystery stack game makes sense.
All of these games run on a random number generator, and no feature, bet mode or Bonus Buy changes the long-run return set by the RTP version your casino runs. Set a budget before you start, play for entertainment, and try the demo mode first.
Conclusion
A small number of games with a strong shared identity built the studio’s name, and the six covered here still define it. Check the RTP on your game’s loading screen before you play, since the 94% versions are common, and give the demo a spin before committing real money. For other studios and their best-known games, see our game providers hub.
Frequently Asked Questions (FAQs)
Push Gaming slots are best known for the Mystery Stacks and Nudge & Reveal mechanic made famous by Razor Shark, where stacked mystery symbols nudge down the reels and reveal symbols or prizes. The studio also publishes a “highest observed win” instead of a theoretical max win.
Push Gaming was founded in 2010 by James Marshall and Winston Lee. Since 2023 LeoVegas Group, part of MGM Resorts International, has held a majority stake, and the studio still runs under its own management from London and Malta.
The default published RTP of Razor Shark is 96.70%, with a 94.06% version also listed on the official game page. Casinos choose which version to run, so check the loading screen or the in-game user panel where you play.
Razor Returns is a bigger version of the same idea. It moves to a 5×5 grid with 40 paylines, adds Collector, Converter and Nudge Up symbols, offers a Bonus Buy and Push Bet, and lists a 100,000x highest observed win. Razor Shark has a slightly higher default RTP (96.70% versus 96.55%) and a simpler feature set.
Many do. Jammin’ Jars, Big Bamboo, Fat Rabbit and Razor Returns list one on their official pages, and Razor Returns adds a full-screen Razor Reveal buy. Razor Shark does not list one, and availability also depends on the casino and market.
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