# Best Online slot games in the UK
Canonical HTML: [Slot game guides](https://howtocasino.uk/best-slot/)
Collection updated: 2026-11-04
The best online slot game for you depends on the rules and features you want to explore. Compare five different game formats below, then use the filters to browse the full collection.
## Five slot games to compare first
These five picks cover distinct mechanics from the games we explain. Use the differences below to choose which rules and features you want to explore first.
Original games, grouped by mechanic. The full collection and its filters follow below.
| Game & studio | What stands out | Before you choose |
| --- | --- | --- |
| [Starburst](https://howtocasino.uk/best-slot/starburst/index.md) — NetEnt. Paylines & Wild respins | Ten fixed paylines can pay from either outside edge. Central Wilds expand across a reel and trigger included respins. | The two paying directions are not twenty separately priced lines. Check the total stake and highest-win-per-line rule. |
| [Gonzo’s Quest](https://howtocasino.uk/best-slot/gonzos-quest/index.md) — NetEnt. Line wins & cascades | Winning symbols disappear and replacement blocks fall into place. Further line wins continue the avalanche with a stage multiplier. | Check the multiplier at each stage. It resets when the avalanche sequence ends; the final value is not applied again to earlier wins. |
| [Reactoonz](https://howtocasino.uk/best-slot/reactoonz/index.md) — Play’n GO. Clusters & charge meters | Connected clusters clear from the grid and charge feature meters. Quantum effects and Gargantoon add further stages to the round. | There are several meters and queued effects to follow. The guide separates their order and explains when they resolve. |
| [Big Bass Bonanza](https://howtocasino.uk/best-slot/big-bass-bonanza/index.md) — Reel Kingdom / Pragmatic Play. Free spins & fish collection | Fisherman Wilds collect Money Fish values during free spins. Collected Fishermen also advance the feature’s retrigger stages. | Fish collection belongs to the free-spins feature. A base-game fish symbol does not award its printed money value by itself. |
| [Sweet Bonanza](https://howtocasino.uk/best-slot/sweet-bonanza/index.md) — Pragmatic Play. Pay-anywhere wins & tumbles | Matching symbols can pay anywhere on the grid, then tumble away. In free spins, multiplier symbols add together for the completed tumble sequence. | The feature multipliers do not apply to every base-game spin. Match the original title: Sweet Bonanza 1000 is a separate version. |
### How we chose these five games
Here, best means a useful match for the mechanics you want to understand. We selected five examples from our existing guides using published game rules and supplier descriptions. Their order follows the features being compared; it is not a payout ranking or a report of real-money play tests.
- **Different ways to form a win.** The selection covers fixed paylines, line-based cascades, connected clusters and pay-anywhere wins. A fishing theme or a familiar name alone does not explain those differences.
- **A feature worth explaining.** Each game illustrates a different system: expanding Wild respins, avalanche multipliers, charge meters, fish collection or free-spin multipliers. The linked answer explains the steps and exceptions.
- **A clearly identified version.** The comparisons refer to the original named games. Match the full title and read the in-game rules, total stake and RTP information at the casino you are considering. Supplier descriptions do not confirm a casino’s installed configuration or account access.
Supplier descriptions checked 4 November 2026 for this comparison. The detailed guides retain their own dated rule sources.
- Source: [Starburst: supplier overview of fixed both-ways paylines, expanding Wilds and respins](https://games.evolution.com/slots/starburst/). Checked 2026-11-04.
- Source: [Gonzo’s Quest: supplier explanation of Avalanche wins and multiplier reset](https://netent.com/games/gonzos-quest/). Checked 2026-11-04.
- Source: [Reactoonz: supplier description of clusters, energy and Quantum features](https://www.playngo.com/games/reactoonz). Checked 2026-11-04.
- Source: [Big Bass Bonanza: supplier description of free-spin money collection and retriggers](https://www.pragmaticplay.com/en/games/big-bass-bonanza/). Checked 2026-11-04.
- Source: [Original Sweet Bonanza: supplier description of pay-anywhere wins, tumbles and feature multipliers](https://www.pragmaticplay.com/en/games/sweet-bonanza-slot/). Checked 2026-11-04.
## Browse the game guides
24 games and families; 25 answers. Browse the HTML collection by game or provider name, documented mechanic and question. A–Z; without ratings.
Filters show documented features and questions covered by our guides. An unlisted feature is unverified here. Provider labels follow the cited game model; they do not establish which casino currently offers it.
### 5 Lions Megaways
Provider / studio: Pragmatic Play (studio and supplier)
Ways wins create tumbles, with conditional Wild multipliers and a choice of free-spin counts and multiplier ranges.
Documented mechanics: Megaways, Cascades, Wilds, Multipliers, Free-spins round
Version & scope: Original Pragmatic Play 5 Lions Megaways; excludes 5 Lions Megaways 2 and other 5 Lions titles.
Public named-game rules are scoped to their sources. The linked answer does not establish an installed GB build, RTP configuration or access in an individual account.
- [How do you play 5 Lions Megaways?](https://howtocasino.uk/best-slot/5-lions-megaways/index.md) — Rules & how to play; Bonus features
- Source: [5 Lions Megaways: GB public game rules, Wilds, Ante Bet and stated RTP](https://www.slotsuk.co.uk/all-games/slots/5-lions-megaways). Consulted 2026-11-04.
- Source: [Original 5 Lions Megaways: GB published trigger awards, free-spin choices and retrigger rules](https://www.monopolycasino.com/slots/5-lions-megaways). Consulted 2026-11-04.
- Source: [5 Lions Megaways: named GB game description and stated 94.50% RTP](https://mrq.com/slots-and-games/5-lions-megaways). Consulted 2026-11-04.
- Source: [Original 5 Lions Megaways launch: identity, tumbles and seven choices; 24 June 2021](https://www.pragmaticplay.com/en/news/pragmatic-play-recharges-asian-adventure-in-5-lions-megaways/). Consulted 2026-11-04.
- Source: [Original 5 Lions Megaways rules: undated international operator-hosted supplier copy](https://cdn.yesplay.bet/assets/documents/pragmatic-play-5-Lions-Megaways-rules.pdf). Consulted 2026-11-04.
- Source: [5 Lions Megaways 2: supplier description identifying the sequel and different features](https://www.pragmaticplay.com/en/games/5-lions-megaways-2/). Consulted 2026-11-04.
### Big Bass Bonanza
Provider / studio: Reel Kingdom (development partner) / Pragmatic Play (publisher and supplier partner)
Fishermen collect Money Fish during free spins and unlock later multiplier stages, while the original’s published RTP figures differ by configuration.
Documented mechanics: Paylines, Wilds, Free-spins round, Collect features, Multipliers
Version & scope: Original five-reel, ten-line Big Bass Bonanza; excludes Splash, Bigger Bass, Megaways, Hold & Spinner and 1000 titles.
The linked answer identifies its source versions and exceptions. Published supplier information does not confirm the installed build, RTP setting or current access at a particular GB casino.
- [How do Big Bass Bonanza free spins and Fisherman multipliers work?](https://howtocasino.uk/best-slot/big-bass-bonanza/index.md) — Bonus features
- [What is the RTP of Big Bass Bonanza?](https://howtocasino.uk/best-slot/big-bass-bonanza/rtp/index.md) — RTP explained
- Source: [Big Bass Bonanza: public description, including multiple collectors](https://www.betfred.com/games/big-bass-bonanza). Consulted 2026-11-02.
- Source: [Big Bass Bonanza original launch, 14 December 2020](https://www.pragmaticplay.com/en/news/pragmatic-play-turns-fishing-to-spins-in-big-bass-bonanza/). Consulted 2026-11-02.
- Source: [Big Bass Bonanza: original Scatter awards and three retrigger stages](https://www.virgingames.com/uk/slots/big-bass-bonanza). Consulted 2026-11-02.
- Source: [Original Big Bass Bonanza rules: third-party copy; feature mechanics only](https://cdn.yesplay.bet/assets/documents/pragmatic-play-Big-Bass-Bonanza-rules.pdf). Consulted 2026-11-02.
- Source: [Big Bass Bonanza: Basic Game Info RTP and original feature description](https://www.pragmaticplay.com/en/games/big-bass-bonanza/). Consulted 2026-11-01.
- Source: [Big Bass Bonanza: public listing displays 94.02% RTP; account build not tested](https://casino.betfair.com/game/big-bass-bonanza-apr). Consulted 2026-11-01.
### Big Bass Splash
Provider / studio: Pragmatic Play (game supplier)
Original Big Bass Splash combines ten paylines with Fisherman fish collections and a free-spin multiplier ladder; helper-animation descriptions differ between consulted sources.
Documented mechanics: Paylines, Wilds, Free-spins round, Collect features, Multipliers
Version & scope: Original Big Bass Splash.
The supplier model is not a particular account’s installed build or RTP configuration.
- [How do you play Big Bass Splash?](https://howtocasino.uk/best-slot/big-bass-splash/index.md) — Rules & how to play; Bonus features
- Source: [Big Bass Splash — supplier game overview; gameIDvs10txbigbass](https://clientzone.betconstruct.com/media/download/h4gzmx/Game-overview-Big-Bass-Splash.pdf). Consulted 2026-10-31.
- Source: [Big Bass Splash — original supplier product description](https://www.pragmaticplay.com/en/games/big-bass-splash/). Consulted 2026-10-31.
- Source: [Big Bass Splash — GB public listing and game overview](https://www.virgingames.com/uk/slots/big-bass-splash). Consulted 2026-10-31.
### Book of Dead
Provider / studio: Play’n GO (studio and supplier)
A selected free-spin symbol can expand on non-adjacent reels when it creates an eligible line award, so its appearance alone does not guarantee expansion.
Documented mechanics: Paylines, Wilds, Free-spins round, Expanding symbols
Version & scope: Original Book of Dead model explained by the supplier walkthrough and GRS0595-3 rules dated 14 September 2022; excludes Legacy and GO Collect versions.
The linked answer identifies its source versions and exceptions. Published supplier information does not confirm the installed build, RTP setting or current access at a particular GB casino.
- [How do Book of Dead free spins and expanding symbols work?](https://howtocasino.uk/best-slot/book-of-dead/index.md) — Bonus features
- Source: [Book of Dead walkthrough: selected expanding symbol and non-adjacent expansion; September 2022](https://www.playngo.com/post/book-of-dead-walkthrough). Consulted 2026-11-01.
- Source: [Book of Dead GRS0595-3, 14 September 2022: feature conditions and separate award units](https://cnsicdn.kubdev.com/common-content/help/CNSI/game-documents/EN-Book-of-Dead.pdf). Consulted 2026-11-01.
### Cleopatra
Provider / studio: IGT (game supplier)
Classic Cleopatra combines selectable paylines with Sphinx-triggered free games and Wild effects, with this guide following dated online rules rather than confirming every current GB edition.
Documented mechanics: Paylines, Wilds, Free-spins round, Multipliers
Version & scope: Classic IGT Cleopatra online model, documented foreign/dates-specific help.
Rules are a documented classic online model, not verification of a latest GB client.
- [How to play Cleopatra: line bets, Wilds and the free-games rules](https://howtocasino.uk/best-slot/cleopatra/index.md) — Rules & how to play; Bonus features
- Source: [Cleopatra Online](https://www.admiralcasino.co.uk/en/slots/cleopatra). Consulted 2026-10-30.
- Source: [Cleopatra - Slot - How To Play](https://www.doublebubblebingo.com/uk/online-slots/cleopatra). Consulted 2026-10-30.
- Source: [Help - Casino - Cleopatra (IGT-format help)](https://help.danskespil.dk/en/casino-help/slots/igtcleopatra). Consulted 2026-10-30.
- Source: [Cleopatra Slot - Cleopatra info](https://games.paddypower.com/game/cleopatra-gig). Consulted 2026-10-30.
- Source: [Help - Casino - Cleopatra](https://help.danskespil.dk/en/casino-help/slots/cleopatra). Consulted 2026-10-30.
- Source: [Cleopatra™ - How To Bet / Rules](https://portail.assets.lotoquebec.com/ressources/assets/v3/assets/blt8296e79a7001648c/blt4dcc1a49847802b3/65143e462f930ae373d2c1c3/cleopatra_rules_en.pdf). Consulted 2026-10-30.
### Deal or No Deal What’s in Your Box
Provider / studio: Blueprint Gaming (game supplier)
Blueprint’s What’s in Your Box uses twenty paylines and a box choice leading to one of five bonus games, while jackpot features depend on the selected configuration.
Documented mechanics: Paylines, Wilds, Respins, Free-spins round, Multipliers, Pick bonus, Feature gamble
Version & scope: Blueprint What’s in Your Box public rules model.
The consulted profile contains configurable Jackpot King material; this does not establish a jackpot on every edition.
- [How does Deal or No Deal What’s in Your Box work?](https://howtocasino.uk/best-slot/deal-or-no-deal-whats-in-your-box/index.md) — Rules & how to play; Bonus features
- Source: [Deal or No Deal: What’s in Your Box — Player Instructions v5.0, applicable 18 January 2023](https://fileservice.blueprintgaming.com/?affiliate=&customer=PADDYPOWERBETFAIR&fileType=help&gameEngineID=dealornodeal&language=EN&profile=jackpotkingdeluxe3). Consulted 2026-10-31.
- Source: [Deal or No Deal What’s in Your Box — public listing and supplier Game help link](https://bingo.paddypower.com/game/dealornodeal-whatsbox-bbp). Consulted 2026-10-31.
- Source: [Deal or No Deal What’s in Your Box — GB public feature description](https://www.virgingames.com/uk/slots/deal-or-no-deal-whats-in-your-box). Consulted 2026-10-31.
### Double Bubble
Provider / studio: varies / not established
This guide compares dated public listings of Double Bubble and explains how to separate the original title from jackpot variants, without establishing current account access.
Documented mechanics: not established for this family
Version & scope: Named Double Bubble public-listing and family/variant identification guide.
The family/listing guide does not certify identical game builds, providers, mechanics, current access or jackpot configuration across operators.
- [Where can I play Double Bubble slots in the UK?](https://howtocasino.uk/best-slot/double-bubble/index.md) — UK availability
- Source: [Double Bubble — named game listing at ballycasino.co.uk](https://www.ballycasino.co.uk/online-games/slots/double-bubble). Consulted 2026-10-31.
- Source: [Double Bubble — public GB game response, game 2005770](https://www.betvictor.com/en-gb/casino/games/2005770-double-bubble). Consulted 2026-10-31.
- Source: [Double Bubble — UK public game listing](https://www.virgingames.com/uk/slots/double-bubble). Consulted 2026-10-31.
### Eye of Horus
Provider / studio: Blueprint Gaming (game supplier)
Classic Eye of Horus uses ten fixed paylines and expanding Horus Wilds, with tablet upgrades during free spins; later editions have separate rules.
Documented mechanics: Paylines, Wilds, Expanding Wilds, Free-spins round, Symbol upgrades
Version & scope: Classic Blueprint ten-line online Eye of Horus.
Public standard-profile rules do not verify every current account build.
- [How to play Eye of Horus: ten lines, Wilds and free spins](https://howtocasino.uk/best-slot/eye-of-horus/index.md) — Rules & how to play; Bonus features
- Source: [Eye of Horus – Player Instructions, applicable 18 January 2023](https://fileservice.blueprintgaming.com/?language=EN&gameEngineID=eyeofhorus&profile=standard&affiliate=&customer=Betfair_Sky&fileType=help). Consulted 2026-10-30.
- Source: [Eye of Horus – classic public game page and help link](https://skyvegas.com/game/eye-of-horus-vbp). Consulted 2026-10-30.
- Source: [Eye of Horus – classic online product description](https://blueprintgaming.com/games/eye-of-horus). Consulted 2026-10-30.
### Fishin’ Frenzy
Provider / studio: Blueprint Gaming (game supplier)
Original Fishin’ Frenzy uses ten fixed paylines and Fisherman fish collections during free spins, which cannot retrigger under the consulted original rules.
Documented mechanics: Paylines, Wilds, Free-spins round, Collect features
Version & scope: Original fixed-ten-line online Fishin’ Frenzy.
Shared original rules do not identify a current account’s selected RTP build.
- [How do you play the original Fishin’ Frenzy?](https://howtocasino.uk/best-slot/fishin-frenzy/index.md) — Rules & how to play; Bonus features
- Source: [Fishin’ Frenzy — original fixed-line product](https://blueprintgaming.com/games/fishin-frenzy). Consulted 2026-10-31.
- Source: [Fishin’ Frenzy — original ten-line game instructions](https://www.rosecasino.com/all-games/fishin-frenzy/). Consulted 2026-10-31.
### Fishin’ Frenzy Megaways
Provider / studio: Blueprint Gaming (studio and supplier)
Variable reel heights create Megaways paths and Fishermen collect Fish values during free games, with the cited version 5.0 rules covering this title rather than later fishing releases.
Documented mechanics: Megaways, Ways to win, Free-spins round, Collect features
Version & scope: Blueprint Fishin’ Frenzy Megaways; detailed model is public player instructions version 5.0 applicable from 21 February 2022; excludes original fixed-line, The Big Catch Megaways, With Pots and physical-machine versions.
The linked answer identifies its source versions and exceptions. Published supplier information does not confirm the installed build, RTP setting or current access at a particular GB casino.
- [How to play Fishin’ Frenzy Megaways: ways, fish and free games](https://howtocasino.uk/best-slot/fishin-frenzy-megaways/index.md) — Rules & how to play
- Source: [Fishin’ Frenzy Megaways: supplier features and configurations](https://blueprintgaming.com/games/fishin-frenzy-megaways). Consulted 2026-11-03.
- Source: [Fishin’ Frenzy Megaways: public player instructions v5.0](https://fileservice.blueprintgaming.com/?affiliate=&customer=PADDYPOWERBETFAIR&fileType=help&gameEngineID=fishingfrenzymegawayslow&language=EN&profile=standard). Consulted 2026-11-03.
- Source: [RTS8: individual commitment to each game cycle](https://www.gamblingcommission.gov.uk/manual/remote-gambling-and-software-technical-standards/rts-8-autoplay-functionality). Consulted 2026-11-03.
- Source: [Fishin’ Frenzy Megaways: public listing and linked help](https://games.paddypower.com/game/fishing-frenzy-mw-gbp). Consulted 2026-11-03.
- Source: [Fishin’ Frenzy Megaways: attributed public RTP and feature summary](https://www.admiralcasino.co.uk/en/slots/fishin-frenzy-megaways). Consulted 2026-11-03.
- Source: [Fishin’ Frenzy Megaways: public free-spin summary](https://www.betvictor.com/en-gb/casino/games/1008107-fishin-frenzy-megaways). Consulted 2026-11-03.
- Source: [Higher risk products: feature buy-in removal case study](https://www.gamblingcommission.gov.uk/guidance/single-machine-application-for-a-permit-guidance-notes/the-gambling-product-what-are-the-issues-higher-risk-products). Consulted 2026-11-03.
- Source: [Online slots stake limits: age bands and complete game cycles](https://www.gamblingcommission.gov.uk/licensees-and-businesses/guide/online-slots-stake-limit-guidance). Consulted 2026-11-03.
- Source: [Fishin’ Frenzy — original fixed-line product](https://blueprintgaming.com/games/fishin-frenzy). Consulted 2026-10-31.
### Fluffy Favourites
Provider / studio: Eyecon (studio and supplier)
Claw symbols award Toybox picks separately from elephant-triggered free games, and the free-games line multiplier does not automatically apply to Toybox prizes.
Documented mechanics: Paylines, Wilds, Pick bonus, Free-spins round, Multipliers
Version & scope: Original Eyecon five-reel, 25-line Fluffy Favourites; excludes Megaways, Mix ’n’ Win, 10 and Jackpot variants.
The linked answer identifies its source versions and exceptions. Published supplier information does not confirm the installed build, RTP setting or current access at a particular GB casino.
- [How does the Fluffy Favourites Toybox bonus work?](https://howtocasino.uk/best-slot/fluffy-favourites/index.md) — Bonus features
- Source: [Original Fluffy Favourites: Toybox picks, total-wager prize basis and separate Free Games](https://eyecon.com/games/fluffy-favourites). Consulted 2026-11-01.
- Source: [Original Fluffy Favourites: dated GB listing and separate feature descriptions](https://www.betvictor.com/en-gb/casino/games/1011714-fluffy-favourites). Consulted 2026-11-01.
- Source: [Fluffy Favourites Megaways: separate title with a different claw role](https://eyecon.com/games/fluffy-favourites-megaways). Consulted 2026-11-01.
### Fruit Party
Provider / studio: Pragmatic Play (game supplier)
Original Fruit Party pays connected clusters on a 7×7 grid and multiplies symbol factors within each winning block, rather than combining multipliers across separate blocks.
Documented mechanics: Cluster pays, Cascades, Multipliers, Free-spins round
Version & scope: Original Pragmatic Play Fruit Party.
Supplier and public rules describe original mechanics, not an account access or RTP test.
- [How do you play Fruit Party?](https://howtocasino.uk/best-slot/fruit-party/index.md) — Rules & how to play; Bonus features
- Source: [Fruit Party — original supplier game description](https://www.pragmaticplay.com/en/games/fruit-party-slot/). Consulted 2026-10-31.
- Source: [Fruit Party — original game rules](https://www.rosecasino.com/all-games/fruit-party/). Consulted 2026-10-31.
### Gates of Olympus
Provider / studio: Pragmatic Play (studio and supplier)
Pay-anywhere tumbles combine multiplier values, but a stored free-spin multiplier needs a new qualifying multiplier symbol to apply to a later win.
Documented mechanics: Pay anywhere, Cascades, Multipliers, Free-spins round
Version & scope: Original Gates of Olympus; Gates of Olympus 1000 is discussed only as a distinct variant.
The linked answer identifies its source versions and exceptions. Published supplier information does not confirm the installed build, RTP setting or current access at a particular GB casino.
- [How do Gates of Olympus multipliers work?](https://howtocasino.uk/best-slot/gates-of-olympus/index.md) — Bonus features
- Source: [Original Gates of Olympus: pay-anywhere wins, tumbles and qualifying feature multipliers](https://www.pragmaticplay.com/en/games/gates-of-olympus/). Consulted 2026-11-01.
- Source: [Original Gates of Olympus: added multiplier values and conditional feature-meter application](https://www.betvictor.com/en-gb/casino/games/1011888-gates-of-olympus). Consulted 2026-11-01.
- Source: [Original Gates of Olympus product page](https://www.pragmaticplay.com/en/games/gates-of-olympus/). Consulted 2026-11-02.
- Source: [Gates of Olympus 1000 product page](https://www.pragmaticplay.com/en/games/gates-of-olympus-1000/). Consulted 2026-11-02.
- Source: [Gates of Olympus 1000 GB listing](https://www.betvictor.com/en-gb/casino/games/2005851-gates-of-olympus-1000). Consulted 2026-11-02.
- Source: [Gates of Olympus 1000 listing](https://games.paddypower.com/game/gates-of-olympus-1000-gpr). Consulted 2026-11-02.
### Gonzo’s Quest
Provider / studio: NetEnt (studio and supplier)
Winning lines start successive avalanches with rising multipliers, but each stage uses its own factor before the sequence resets.
Documented mechanics: Paylines, Cascades, Multipliers, Free-spins round
Version & scope: Classic NetEnt Gonzo’s Quest, five reels, three rows and 20 lines; mechanic detail uses Touch rules plus an explicitly dated Norwegian-market 2017 game sheet.
The linked answer identifies its source versions and exceptions. Published supplier information does not confirm the installed build, RTP setting or current access at a particular GB casino.
- [How do Gonzo’s Quest avalanches work?](https://howtocasino.uk/best-slot/gonzos-quest/index.md) — Bonus features
- Source: [Gonzo’s Quest: current supplier overview; named classic layout and multiplier caps](https://netent.com/games/gonzos-quest/). Consulted 2026-11-01.
- Source: [Gonzo’s Quest Touch game rules: operator-hosted undated document; avalanche continuation, reset and line trigger](https://cms.rationalcdn.com/v3/assets/blteecf9626d9a38b03/blt408024e1985f515c/65d5b5c123db7e5deddb3669/Gonzos_Quest_mobile_html_en.pdf). Consulted 2026-11-01.
- Source: [Gonzo’s Quest game sheet v1.0, 1 November 2017: classic meter illustrations; Norwegian-market copy](https://wewin.neocities.org/slots/Gonzos_QuestTM_eldorado_not_mobile_Game_Sheet_en.pdf). Consulted 2026-11-01.
### Jammin’ Jars
Provider / studio: Push Gaming (studio and supplier)
Moving jar Wilds raise multipliers within collapsing clusters, with the original’s Free Games rules distinct from Jammin’ Jars 2 and Giga Jar.
Documented mechanics: Cluster pays, Cascades, Wilds, Multipliers, Free-spins round
Version & scope: Original Push Gaming Jammin’ Jars; excludes Jammin’ Jars 2 and Giga Jar.
The linked answer identifies its source versions and exceptions. Published supplier information does not confirm the installed build, RTP setting or current access at a particular GB casino.
- [How do Jammin’ Jars multipliers and free spins work?](https://howtocasino.uk/best-slot/jammin-jars/index.md) — Bonus features
- Source: [Original Jammin’ Jars — jars, clusters, trigger and configuration warning](https://www.pushgaming.com/games/jammin-jars.html). Consulted 2026-11-02.
- Source: [Original Jammin’ Jars — public GB cluster and six-free-spin description](https://casino.netbet.co.uk/game/jammin-jars). Consulted 2026-11-02.
- Source: [How online slot multipliers work — original Jammin’ Jars example, 17 October 2019](https://www.pushgaming.com/blog/how-online-slot-multipliers-work.html). Consulted 2026-11-02.
- Source: [Jammin’ Jars 2 — separate sequel feature identity](https://www.pushgaming.com/games/jammin-jars-2.html). Consulted 2026-11-02.
- Source: [Giga Jar — separate product and feature identity](https://www.pushgaming.com/games/giga-jar.html). Consulted 2026-11-02.
- Source: [Original Jammin’ Jars — public jar, cascade and Rainbow rules](https://www.virgingames.com/uk/slots/jammin-jars). Consulted 2026-11-02.
### King Kong Cash
Provider / studio: Blueprint Gaming (studio and supplier)
A random reel modifier and a symbol-triggered bonus wheel lead to different features, with original-game rules kept separate from Cashpots and other sequels.
Documented mechanics: Paylines, Wilds, Random modifiers, Bonus wheel, Free-spins round
Version & scope: Original Blueprint BP_KingKongCash, five-by-three base game with 20 paylines; excludes Cashpots, Even Bigger Bananas and Jackpot King.
The linked answer identifies its source versions and exceptions. Published supplier information does not confirm the installed build, RTP setting or current access at a particular GB casino.
- [How do King Kong Cash bonuses work?](https://howtocasino.uk/best-slot/king-kong-cash/index.md) — Bonus features
- Source: [King Kong Cash BP_KingKongCash: original layout, modifier route and five bonus games](https://blueprintgaming.com/games/king-kong-cash). Consulted 2026-11-01.
- Source: [Original King Kong Cash: public How to Play; legacy options and modifier-count discrepancy retained as limits](https://www.grosvenorcasinos.com/games/king-kong-cash). Consulted 2026-11-01.
### Mega Joker
Provider / studio: NetEnt (game supplier)
Mega Joker moves qualifying Basic-game winnings into a Supermeter that funds further paid spins, so those upper-reel spins are not free spins.
Documented mechanics: Paylines, Supermeter, Collect features
Version & scope: NetEnt three-reel, five-line Basic and Supermeter game.
Foreign undated rules and a historical sheet do not establish a current GB installation or enabled stake choices.
- [How do you play Mega Joker?](https://howtocasino.uk/best-slot/mega-joker/index.md) — Rules & how to play; Bonus features
- Source: [Mega Joker — published Romanian game rules; undated, hosted on distributor CDN](https://static.everymatrix.com/cms2/maxbet/_casino/3/3C7628C6BAB26312048B2DEA10818297.pdf). Consulted 2026-10-31.
- Source: [Mega Joker — supplier overview, RTP endpoints and jurisdiction warning](https://games.evolution.com/slots/mega-joker/). Consulted 2026-10-31.
- Source: [Mega Joker — supplier game description, coin stakes and Supermeter](https://games.netent.com/games/mega-joker). Consulted 2026-10-31.
- Source: [Mega Joker Game Sheet — version1.1,31May2019; third-party mirror](https://wewin.neocities.org/slots/Mega_Joker__megajoker_not_mobile_Game_Sheet_default_en.pdf). Consulted 2026-10-31.
### Rainbow Riches
Provider / studio: Scientific Games (historical documented supplier)
Original Rainbow Riches combines paylines with three distinct scatter-triggered bonus features, with no in-game free-spins round in the documented model.
Documented mechanics: Paylines, Wilds, Multipliers, Pick bonus
Version & scope: Original online Rainbow Riches, not GDM.
The historical supplier model supports one to twenty lines; a current operator description says fixed twenty and differs over pot selection.
- [How do you play the original Rainbow Riches slot?](https://howtocasino.uk/best-slot/rainbow-riches/index.md) — Rules & how to play; Bonus features
- Source: [Rainbow Riches (GDM) — game IDs 71504–71508, UK release 16 July 2025](https://igaming.lnw.com/games/rainbow-riches-gdm-2-2/). Consulted 2026-10-31.
- Source: [Rainbow Riches — original WMS game help, last modified 16 May 2018](https://help.danskespil.dk/en/casino-help/slots/wmsrainbowriches). Consulted 2026-10-31.
- Source: [Rainbow Riches Mobile Product Sheet — game ID rainbowriches, ©2015; PDF pages 83–89](https://content.hollywoodbets.net/LnW%20Game%20Rules%20Compressed.pdf). Consulted 2026-10-31.
- Source: [Rainbow Riches — GB game overview and fixed-twenty-line description](https://www.virgingames.com/uk/slots/rainbow-riches). Consulted 2026-10-31.
### Reactoonz
Provider / studio: Play’n GO (studio and supplier)
Cluster wins charge queued Quantum effects and Gargantoon Wild stages, which resolve within the round rather than representing extra paid spins.
Documented mechanics: Cluster pays, Cascades, Wilds, Charge meter
Version & scope: Original Reactoonz; excludes Reactoonz 100 and other similarly named releases.
The linked answer identifies its source versions and exceptions. Published supplier information does not confirm the installed build, RTP setting or current access at a particular GB casino.
- [How do Reactoonz Quantum features and Gargantoon work?](https://howtocasino.uk/best-slot/reactoonz/index.md) — Bonus features
- Source: [Original Reactoonz: 2017 title and cluster mechanics](https://www.playngo.com/games/reactoonz). Consulted 2026-11-02.
- Source: [Reactoonz rules dated 19 August 2025: mechanics, pages 1-2; paytable export error excluded](https://cnsicdn.kubdev.com/common-content/help/CNSI/game-documents/EN-Reactoonz.pdf). Consulted 2026-11-02.
- Source: [Reactoonz: public description of Quantum effects and five meters](https://www.betfred.com/games/reactoonz). Consulted 2026-11-02.
- Source: [Reactoonz GB description: indexed queue and Wild-sequence reference](https://www.betvictor.com/en-gb/casino/games/1003025-reactoonz). Consulted 2026-11-02.
- Source: [Reactoonz 100: separate GID and reversed Wild-block progression](https://cnsicdn.kubdev.com/common-content/help/CNSI/game-documents/EN-Reactoonz100.pdf). Consulted 2026-11-02.
- Source: [Petfre (Gibraltar) Limited: active Remote Casino permission, account 39544](https://www.gamblingcommission.gov.uk/public-register/business/detail/39544). Consulted 2026-11-02.
- Source: [Petfre (Gibraltar) Limited: active betfred.com domain entry](https://www.gamblingcommission.gov.uk/public-register/business/detail/domain-names/39544). Consulted 2026-11-02.
- Source: [BV Gaming Limited: active Remote Casino permission, account 39576](https://www.gamblingcommission.gov.uk/public-register/business/detail/39576). Consulted 2026-11-02.
- Source: [BV Gaming Limited: active betvictor.com domain entry](https://www.gamblingcommission.gov.uk/public-register/business/detail/domain-names/39576). Consulted 2026-11-02.
- Source: [RTS 8: individual commitment to game cycles and autoplay restriction](https://www.gamblingcommission.gov.uk/manual/remote-gambling-and-software-technical-standards/rts-8-autoplay-functionality). Consulted 2026-11-02.
### Starburst
Provider / studio: NetEnt (studio and supplier)
Ten paylines pay from either outside edge and central Wilds expand for included respins, without turning the game into twenty separately priced lines.
Documented mechanics: Paylines, Wilds, Expanding Wilds, Respins
Version & scope: Classic NetEnt Starburst, five reels, three rows and ten fixed paylines; excludes Starburst XXXtreme.
The linked answer identifies its source versions and exceptions. Published supplier information does not confirm the installed build, RTP setting or current access at a particular GB casino.
- [How to play Starburst: paylines, Wilds and respin returns](https://howtocasino.uk/best-slot/starburst/index.md) — Rules & how to play
- Source: [Starburst — public game help](https://www.slotsuk.co.uk/all-games/slots/starburst). Consulted 2026-10-30.
- Source: [Starburst: supplier description of ten fixed both-ways paylines](https://games.evolution.com/slots/starburst/). Consulted 2026-10-30.
- Source: [Starburst — supplier product page](https://netent.com/games/starburst). Consulted 2026-10-30.
- Source: [Starburst — public overview](https://www.midnite.com/casino/game/starburst). Consulted 2026-10-30.
- Source: [RTS 3: rules, game descriptions and likelihood of winning](https://www.gamblingcommission.gov.uk/manual/remote-gambling-and-software-technical-standards/rts-3-rules-game-descriptions-and-the-likelihood-of-winning). Consulted 2026-11-01.
### Sugar Rush
Provider / studio: Pragmatic Play (studio and supplier)
Winning grid positions build multiplier spots that persist through free spins, while base-game marks clear when the tumble sequence ends.
Documented mechanics: Cluster pays, Cascades, Multipliers, Free-spins round
Version & scope: Original Sugar Rush, with the original multiplier-spot ceiling; excludes Sugar Rush 1000.
The linked answer identifies its source versions and exceptions. Published supplier information does not confirm the installed build, RTP setting or current access at a particular GB casino.
- [How do Sugar Rush multiplier spots work?](https://howtocasino.uk/best-slot/sugar-rush/index.md) — Bonus features
- Source: [Sugar Rush rules: undated third-party copy; cluster addition and history totals](https://cdn.yesplay.bet/assets/documents/pragmatic-play-Sugar-Rush-rules.pdf). Consulted 2026-11-02.
- Source: [Original Sugar Rush: positions, 128x ceiling and free-spin persistence](https://www.pragmaticplay.com/en/games/sugar-rush/). Consulted 2026-11-02.
- Source: [Sugar Rush GB description: indexed reference; direct page access unavailable](https://www.betvictor.com/en-gb/casino/games/1004162-sugar-rush). Consulted 2026-11-02.
- Source: [Sugar Rush 1000: separate-version multiplier announcement, 18 March 2024](https://www.pragmaticplay.com/en/news/pragmatic-play-adds-to-sweet-sensation-in-sugar-rush-1000/). Consulted 2026-11-02.
### Sweet Bonanza
Provider / studio: Pragmatic Play (game supplier)
Original Sweet Bonanza pays matching symbols anywhere before tumbling replacements, with free-spin multiplier symbols added for each completed sequence rather than carried across the whole feature.
Documented mechanics: Pay anywhere, Cascades, Free-spins round, Multipliers
Version & scope: Original Pragmatic Play Sweet Bonanza.
Comparison of 1000 does not merge it into the original entity or transfer its multiplier range.
- [How do you play classic Sweet Bonanza?](https://howtocasino.uk/best-slot/sweet-bonanza/index.md) — Rules & how to play; Bonus features
- Source: [Original Sweet Bonanza product page](https://www.pragmaticplay.com/en/games/sweet-bonanza-slot/). Consulted 2026-11-02.
- Source: [Sweet Bonanza 1000 GB listing and rules](https://www.grosvenorcasinos.com/games/sweet-bonanza-1000). Consulted 2026-11-02.
- Source: [Sweet Bonanza 1000 product page](https://www.pragmaticplay.com/en/games/sweet-bonanza-1000/). Consulted 2026-11-02.
- Source: [Original Sweet Bonanza game overview: supplier document hosted by an international operator](https://blog.sportpesa.co.tz/wp-content/uploads/2024/01/Game-overview-Sweet-Bonanza-compressed-1.pdf). Consulted 2026-10-31.
- Source: [Sweet Bonanza: original supplier product page](https://www.pragmaticplay.com/en/games/sweet-bonanza-slot/). Consulted 2026-10-31.
- Source: [Original Sweet Bonanza rules: international operator-hosted copy](https://yesplay.bet/assets/documents/pragmatic-play-Sweet-Bonanza-rules.pdf). Consulted 2026-10-31.
### Ted
Provider / studio: Blueprint Gaming (game supplier)
Original Ted uses twenty paylines and a Thunder Buddies wheel awarding one of five features, while the optional feature gamble can change the offered award.
Documented mechanics: Paylines, Wilds, Respins, Free-spins round, Multipliers, Pick bonus, Feature gamble
Version & scope: Original Blueprint Ted fixed-line slot.
Original standard help does not certify all current account optional controls or a universal maximum cash award.
- [How do you play the Ted slot?](https://howtocasino.uk/best-slot/ted/index.md) — Rules & how to play; Bonus features
- Source: [Ted — BP_Ted catalogue entry dated 1 March 2017](https://blueprintgaming.com/games/ted). Consulted 2026-10-31.
- Source: [Ted — GB listing and link to standard-profile supplier help](https://skyvegas.com/game/ted-vbp). Consulted 2026-10-31.
- Source: [Ted Player Instructions — standard profile v6.0, applicable from 17 January 2023](https://fileservice.blueprintgaming.com/?affiliate=&customer=Betfair_Sky&fileType=help&gameEngineID=ted&language=EN&profile=standard). Consulted 2026-10-31.
### Who Wants to Be a Millionaire Megaways
Provider / studio: Big Time Gaming (game supplier)
The original Big Time Gaming Megaways slot links reacting wins to a growing free-spin multiplier, while the Hot Seat ladder can reduce as well as increase the awarded spins.
Documented mechanics: Megaways, Cascades, Wilds, Free-spins round, Multipliers, Feature gamble
Version & scope: Original Big Time Gaming Millionaire Megaways slot.
The named public help is not a current GB account configuration test.
- [How does Who Wants to Be a Millionaire Megaways work?](https://howtocasino.uk/best-slot/who-wants-to-be-a-millionaire-megaways/index.md) — Rules & how to play; Bonus features
- Source: [Millionaire Megaways — supplier product description](https://games.evolution.com/slots/millionaire-megaways/). Consulted 2026-10-30.
- Source: [Millionaire Help — game rules dated 26 March 2024](https://cms.rationalcdn.com/v3/assets/blteecf9626d9a38b03/blta81843ca17ea435e/67405ae9d2a8832bf13e72c9/Millionaire-Megaways-Help-EN.pdf). Consulted 2026-10-30.
- Source: [Who Wants to Be a Millionaire Megaways — GB-facing game overview](https://www.virgingames.com/uk/slots/who-wants-to-be-a-millionaire-megaways). Consulted 2026-10-31.
## Match the game, then the question
Match the complete title before opening a guide. Original games, sequels, Megaways editions and live shows can share a name while using different rules. A family entry explains that distinction rather than combining its versions into one specification.
Provider and mechanic filters follow the documents cited in each answer. A developer, a game supplier and a company licensing a mechanic can be different parties. Where the evidence does not identify a provider or feature, it remains unverified here.
The answers explain public rules and their limits. They do not establish current account access, the RTP configuration at a particular casino or a live offer. Follow an availability guide for its dated listings, and check the exact game and service before relying on a match.
[Slot rules and terms](https://howtocasino.uk/guides/slots/index.md) · [Finding a named game in the UK](https://howtocasino.uk/guides/where-can-i-find-a-specific-online-slot-in-the-uk/index.md) · [Comparing game information](https://howtocasino.uk/guides/how-to-compare-online-slot-games/index.md)
## Questions about the game guides
### How do I find a guide to a particular slot?
Search for the game title, or narrow the list by provider, mechanic and the question you want answered. Open the result that matches the game or family you mean.
### Why can one game have more than one guide?
Different guides answer different questions. Big Bass Bonanza, for example, has separate guides to its free-spins features and RTP versions. The question shown on each result identifies its focus.
### Where can I learn the general rules and terms?
Start with our slot basics guides for general explanations of rules, RTP and common features. Use this collection when you need an answer about a named game.
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