Reel Kingdom Slots

Reel Kingdom Overview

Reel Kingdom slots occupy a specialist position in the online slot market — the Cardiff-based studio develops slots exclusively for distribution through Pragmatic Play, which means every Reel Kingdom title reaches UK operators under the Pragmatic Play brand umbrella. The studio was founded in 2015 in Cardiff, Wales by a team of industry veterans with more than 100 years of combined experience in land-based and online casino game development. The founding team's background at Astra Games and other UK land-based gaming companies shaped the studio's design sensibility, which favours simple mechanics wrapped in polished artwork over complex mathematical innovation. Reel Kingdom's first slot, Hot to Burn, launched in May 2020 as a classic fruit-themed release. The studio signed its exclusive distribution partnership with Pragmatic Play at launch, with Ultra Burn following in October 2020 as the second collaboration. The commercial breakthrough arrived in December 2020 with Big Bass Bonanza — a fishing-themed 10-payline slot that triggered one of the most successful franchise expansions in online slot history. Over 30 Big Bass titles now exist across the series, with Big Bass Splash and Big Bass Bonanza frequently ranking among the most-played slots globally. Reel Kingdom won SlotCatalog Game Studio of the Year at the CasinoBeats Game Developer Awards 2024. Compliance and regulatory coverage routes through Pragmatic Play's licence framework — UK Gambling Commission and Malta Gaming Authority in primary markets, plus additional jurisdiction-specific certification handled by the distributor. Testing and audit certification routes through eCOGRA. The studio focuses exclusively on slot development and does not produce live casino games, table games or bingo — those verticals sit elsewhere in Pragmatic Play's portfolio.

Reel Kingdom Software and Technology

Every Reel Kingdom title runs on HTML5 through Pragmatic Play's distribution platform, with mobile-first design philosophy applied from the ground up. The studio's signature mechanical vocabulary centres on the Fisherman Wild collect mechanic introduced in Big Bass Bonanza — money symbols (fish) land on the reels during free spins carrying random cash values between 0.2x and 2,000x stake, and a Fisherman Wild symbol collects all visible cash values when it lands on the same spin. The mechanic became the commercial spine of the Big Bass franchise and has been iterated across 30+ sequels with progressive enhancements. Beyond the fishing-collect framework, Reel Kingdom has developed the Hold & Spin respin mechanic (Hot to Burn Hold and Spin, Floating Dragon Hold & Spin), the Progressive Wild Trail (multipliers that climb through collected wild symbols during free spins, capped at 10x in Big Bass Bonanza and 50x in Big Bass Amazon Xtreme), the Ante Bet option (50% stake increase that doubles scatter frequency), and the Pot Pick bonus modifier (Big Bass Amazon Xtreme's pre-bonus customisation feature). Most titles ship with operator-configurable multi-tier RTP settings — commonly three tiers including a headline 96%+ top tier and reduced 94–95% operator tiers — so the in-game info panel must be checked before real-money play. RNG certification routes through eCOGRA on a per-title basis.

Best Reel Kingdom Slots

The best Reel Kingdom slots cluster around the Big Bass franchise with Floating Dragon and Hot to Burn Hold & Spin rounding out the flagship tier. The ten titles below are each verified across authoritative catalogue sources and account for most studio revenue at UK operators carrying Pragmatic Play content.

Big Bass Bonanza

Big Bass Bonanza released on 3 December 2020 as Reel Kingdom's breakthrough slot and the franchise foundation. RTP is 96.71% at the top tier (configurable to 95.67% or 94.5% at operator discretion), volatility rates medium-high (4/5), and the maximum win caps at 2,100x stake. The 5x3 grid runs 10 fixed paylines on an underwater fishing theme. Three, four or five dynamite scatters trigger 10, 15 or 20 free spins respectively. During free spins, fish money symbols land with random values between 2x and 2,000x, and a Fisherman Wild collects all visible values when it lands on the same spin. Every fourth Fisherman Wild collected awards 10 additional free spins and increases the multiplier on future collections (1x, 2x, 3x, up to 10x on the third retrigger).

Big Bass Splash

Big Bass Splash released in June 2022 as the franchise's commercial peak title. RTP is 96.71% at the top tier, volatility rates high, and the maximum win caps at 5,000x stake. The 5x3 grid runs 10 fixed paylines with a Wild-West-influenced fishing theme. The core Fisherman Wild collect mechanic carries over from Big Bass Bonanza, with extended progression — every fourth Wild collected adds +10 free spins and increases the collection multiplier up to 10x. The title regularly ranks as Reel Kingdom's most-played slot at UK operators and finished second overall in player polls for most-played slot of 2023.

Big Bass Amazon Xtreme

Big Bass Amazon Xtreme released in June 2023 as the fourth major entry in the Big Bass series. RTP is 96.07% at the top tier (configurable to 95.08% or 94.05%), volatility rates high, and the maximum win caps at 10,000x stake — a 4.7x increase over the original Big Bass Bonanza's 2,100x cap. The 5x3 grid runs 10 fixed paylines on an Amazon rainforest fishing theme. The Pot Pick feature introduces customisable pre-bonus modifiers — players select from 14 vases revealing extra free spins, guaranteed Money symbols, pre-collected Fisherman Wilds, or low-value-fish removal until a Boot symbol appears. The Progressive Trail climbs across seven tiers with the multiplier reaching 50x on all Money symbol collections.

Bigger Bass Bonanza

Bigger Bass Bonanza released on 16 September 2021 as the first Big Bass sequel. RTP is 96.71% at the top tier, volatility rates very high (5/5), and the maximum win caps at 4,000x stake. The 5x3 grid runs 12 paylines (expanded from the original's 10). The random Bazooka modifier adds extra Money symbols to the reels during the bonus round. The Fisherman Wild collect mechanic operates with higher Money symbol density than the original, and the multiplier can reach 10x during free spins. The title positioned the franchise as a sequel-capable commercial property.

Floating Dragon Hold & Spin

Floating Dragon Hold & Spin released on 15 April 2021 as Reel Kingdom's Asian-themed departure from fishing. RTP is 96.71% at the top tier (configurable to 95.67% or 94.62%), volatility rates high, and the maximum win caps at 5,000x stake. The 5x3 grid runs 10 fixed paylines. Three gold coin symbols on the middle reel trigger the Hold & Spin feature — all triggering coins lock in position, reels clear except the middle reel, and players get 3 respins that reset each time a new Money symbol lands. Diamond symbols carry values between 100x and 5,000x stake. A secondary Free Spins mode delivers 10–20 free spins with an Asian Lady wild that collects fish money symbols, identical in structure to the Big Bass collect mechanic.

Big Bass Bonanza Megaways

Big Bass Bonanza Megaways released in November 2021 as the first Megaways entry in the franchise under Pragmatic Play's Big Time Gaming licence. RTP is 96.72% at the top tier, volatility rates very high, and the maximum win caps at 4,000x stake. The 6-reel grid runs up to 46,656 ways to win with the Fisherman Wild collect mechanic applied to the Megaways engine. The title suits Big Bass fans who want the ways-to-win structure, though the max-win ceiling sits lower than the Pot Pick-driven Amazon Xtreme.

Big Bass Hold & Spinner Megaways

Big Bass Hold & Spinner Megaways released as the franchise's combined Megaways and Hold & Spin title. RTP is 96.11% at the top tier, volatility rates very high, and the maximum win caps at 20,000x stake — the highest ceiling in the Big Bass series. The 6-reel grid runs 46,656 ways to win with the Hold & Spin respin feature layered on top during free spins. The title combines the franchise's most successful mechanical elements into a single release.

Hot to Burn Hold and Spin

Hot to Burn Hold and Spin released as an extension of Reel Kingdom's first slot (Hot to Burn, May 2020). RTP is 95.64%, volatility rates high, and the maximum win caps at 20,000x stake. The 5x3 grid runs 20 fixed paylines on a classic fruit theme. The Streak Respins feature triggers when fruit symbols cluster on the reels, with the respin counter refreshing on each new cash-value symbol. Filling the screen with money symbols triggers the Big Money Wheel with the 20,000x ceiling. The title delivers the highest max-win in the Hot to Burn franchise and represents Reel Kingdom's classic-fruit output at its most commercially aggressive.

Ultra Burn

Ultra Burn released on 19 October 2020 as Reel Kingdom's second-ever slot under the Pragmatic Play partnership. RTP varies between configurable tiers, volatility rates medium, and the maximum win caps at 500x stake. The 3x3 grid runs 5 paylines on a classic fruity theme with BAR, Lucky 7 and Cherry symbols — a deliberate replication of land-based machine slot design. The fast-paced no-bonus-round format suits players wanting a minimalist classic slot experience. The title demonstrates Reel Kingdom's ability to produce commercially functional classic slots alongside the more feature-heavy Big Bass series.

Reel Kingdom Catalogue and Distribution

The Reel Kingdom catalogue splits across three major product families. The Big Bass franchise anchors the catalogue — more than 30 titles including Big Bass Bonanza, Bigger Bass Bonanza, Big Bass Splash, Big Bass Bonanza Megaways, Christmas Big Bass Bonanza, Big Bass Keeping It Reel, Bigger Bass Blizzard, Big Bass Amazon Xtreme, Big Bass Secrets of the Golden Lake, Big Bass Day at the Races, Big Bass Reel Action, Big Bass Xmas Xtreme, Big Bass Bonanza 3 Reeler and Big Bass Halloween 2. The Hold & Spin family covers Hot to Burn Hold and Spin, Ultra Hold and Spin, Floating Dragon Hold & Spin and related respin-mechanic releases. The Asian-theme Floating Dragon family extends through Floating Dragon Megaways (September 2022), Floating Dragon New Year Festival Ultra Megaways Hold & Spin (2024, 96.70% RTP, 20,000x max win) and Floating Dragon Year of the Snake (13 January 2025, 96.71% RTP, 5,000x max win). For contrast with another classic-era developer with substantially different mechanic focus, see our NetEnt slots guide. The live Reel Kingdom slots list at a major UK operator commonly covers 50–70 of the studio's 70+ active titles. Because distribution runs exclusively through Pragmatic Play, players find Reel Kingdom content filed under the Pragmatic Play provider filter at UK operators rather than under a separate Reel Kingdom category. The complete slots list lives on Pragmatic Play's distribution portal with release cadence running at 6–10 new Reel Kingdom titles per calendar year, plus 4–6 Big Bass franchise entries per year.

Reel Kingdom History and Key Milestones

The Foundation Era (2015–2020)

Reel Kingdom was founded in 2015 in Cardiff by a team of industry veterans with combined 100+ years of experience in UK and European land-based casino and AWP (Amusement with Prizes) gaming machine development. The founding team included Creative Director Rob Williams with backgrounds at Astra Games and other UK land-based gaming companies. The studio operated in a pre-launch development phase for several years before releasing its first commercial slot, reflecting the team's focus on perfecting a distinct mechanical vocabulary before market entry. For contrast with another small studio built by industry veterans, see our Peter & Sons slots guide.

The Pragmatic Play Partnership (2020)

Hot to Burn launched in May 2020 as Reel Kingdom's first commercial slot and the opening title in the studio's exclusive distribution partnership with Pragmatic Play. Ultra Burn followed on 19 October 2020 with a 3x3 five-payline classic format. Both titles demonstrated the studio's land-based sensibility translated into online HTML5 format, with simple mechanics and polished artwork. Pragmatic Play's distribution reach — covering 30+ languages and most UK-licensed operators — gave Reel Kingdom instant global scale. The partnership structure means all Reel Kingdom content reaches operators under Pragmatic Play's regulatory framework and operator contracts, with Reel Kingdom focused on pure game development.

The Big Bass Breakthrough (2020–present)

Big Bass Bonanza released on 3 December 2020 and immediately became a commercial breakthrough in UK casino lobbies. The Fisherman Wild collect mechanic — visibly inspired by Reel Time Gaming's Fishin' Frenzy (2014) — paired with polished cartoon artwork and operator-configurable RTP tiers produced the highest-selling slot of Reel Kingdom's first year and one of the most successful fishing-themed slots ever built. Bigger Bass Bonanza (September 2021), Big Bass Bonanza Megaways (November 2021) and Christmas Big Bass Bonanza (late 2021) followed as the franchise expanded. Big Bass Splash (June 2022) marked the commercial peak of the franchise with 5,000x max win and a Wild-West aesthetic. Big Bass Amazon Xtreme (June 2023) introduced the Pot Pick modifier and 10,000x max win. Big Bass Hold & Spinner Megaways pushed the ceiling to 20,000x. The franchise continued expanding through 2024 and 2025 with Big Bass Xmas Xtreme (November 2024), Big Bass Bonanza 3 Reeler (December 2024) and Big Bass Bonanza 1000 (2025, 96.51% RTP, 20,000x max win). For comparison with another major franchise-driven studio, see our Blueprint Gaming slots guide covering Fishin' Frenzy and Eye of Horus franchise extensions.

The Big Bass Franchise

The Big Bass franchise is Reel Kingdom's most significant commercial achievement and one of the most prolific slot franchises in the online gambling industry. More than 30 titles carry the Big Bass name, each built around the same core Fisherman Wild collect mechanic with iterative feature additions.

How the Collect Mechanic Works

The core mechanic fires during free-spin rounds. Fish Money symbols land on the reels with random cash values typically between 0.2x and 2,000x stake (higher in later franchise entries). Standalone, these symbols have no value in base-game play — they sit visible on the reels but don't contribute to line wins. During free spins, the Fisherman Wild symbol collects all visible cash values when it lands on the same spin. Every fourth Fisherman Wild collected through the Progressive Trail typically adds extra free spins and increases the collection multiplier (commonly climbing 1x, 2x, 3x, 10x across retriggers in earlier games, up to 50x in later entries like Big Bass Amazon Xtreme).

Franchise Evolution

Each Big Bass sequel adds a feature layer to the core mechanic. Bigger Bass Bonanza added the Bazooka modifier. Big Bass Bonanza Megaways applied the Megaways engine. Big Bass Splash extended the Progressive Trail to higher multipliers. Big Bass Amazon Xtreme introduced the Pot Pick pre-bonus customisation. Big Bass Hold & Spinner Megaways combined Megaways and Hold & Spin mechanics. The latest releases (Big Bass Bonanza 3 Reeler, Big Bass Bonanza 1000) experiment with grid sizes and payline configurations while preserving the core collect rhythm. For contrast with another collect-mechanic-focused studio, see our Nolimit City slots guide covering the high-volatility specialist.

Key Big Bass Titles Ranked by Max Win

Reel Kingdom Slot Features and Mechanics

Four signature mechanic families account for most of Reel Kingdom's output — the Fisherman Wild collect mechanic, the Hold & Spin respin framework, the Progressive Wild Trail multiplier ladder, and the Ante Bet scatter-frequency modifier.

Hold & Spin Mechanic

Hold & Spin anchors Hot to Burn Hold and Spin, Floating Dragon Hold & Spin, Ultra Hold and Spin and related respin-focused releases. The mechanic triggers when three qualifying symbols (gold coins, fruit money symbols) land on the middle reel or across designated positions. Triggering symbols lock in place, reels clear except for the triggered positions, and players get 3 respins that reset to 3 each time a new qualifying symbol lands. Diamond or premium symbols in Floating Dragon Hold & Spin carry values between 100x and 5,000x stake, providing the path to maximum win. The mechanic provides a second bonus-round option alongside the collect-mechanic free spins in some titles.

Ante Bet Option

The Ante Bet option increases stake by 50% in exchange for doubled scatter frequency. Ante Bet preserves RTP almost identically to the standard stake (commonly 96.07% vs 96.06% — a 0.01% difference in Big Bass Amazon Xtreme). The option gives players faster bonus-round access without meaningfully shifting expected value. Ante Bet is available in most Big Bass franchise entries and related Reel Kingdom titles. For a studio with different high-volatility mechanical focus, see our Thunderkick slots guide.

Bonus Buy Availability

Bonus buy options ship on most Reel Kingdom Big Bass titles in international markets at pricing typically around 100x stake for direct free-spin entry. Big Bass Bonanza, Big Bass Splash, Big Bass Amazon Xtreme and most franchise entries carry bonus buy in non-UK markets. All bonus buy purchases are stripped from UK-facing builds under the UK Gambling Commission's RTS 14A rule, which prohibits mechanics that encourage increased stake. UK players access bonus rounds exclusively through natural scatter triggers or — with Ante Bet activated — at doubled scatter frequency in exchange for a 50% stake increase.

Reel Kingdom Slots RTP and Volatility

Reel Kingdom slots RTP varies across the catalogue with top-tier headline RTPs typically in the 96.07%–96.72% band. The core Big Bass franchise ships at 96.71% on the original, 96.72% on the Megaways version, and 96.07% on Big Bass Amazon Xtreme and most later entries. Floating Dragon Hold & Spin publishes at 96.71% top tier. Hot to Burn Hold and Spin sits lower at 95.64%. All titles ship with operator-configurable multi-tier RTP, commonly offering three tiers — the published top tier around 96.07%–96.72%, a mid-tier around 95.08%, and a low tier around 94.05% (all three appear on Big Bass Amazon Xtreme). Operators select the active tier, and the in-game info panel must be checked before real-money play. For a studio with consistently single-tier RTP transparency, see our Play'n GO slots guide. The highest RTP Reel Kingdom slot is Big Bass Bonanza Megaways at 96.72% top tier, followed by Big Bass Bonanza, Big Bass Splash, Bigger Bass Bonanza and Floating Dragon Hold & Spin all at 96.71%. Reel Kingdom publishes volatility ratings concentrated in the high and very-high bands — the Big Bass franchise rates high (4/5) on the original, very high (5/5) on Bigger Bass Bonanza, and high across most sequels. Floating Dragon Hold & Spin rates high (4/5). The high-variance positioning reflects the studio's commercial strategy of pairing low-complexity base games with bonus-round-concentrated win potential. Big Bass Bonanza's 2,100x ceiling sits modest among high-volatility slots, while Big Bass Hold & Spinner Megaways reaches the 20,000x ceiling.

Where to Play Reel Kingdom Slots

You will find Reel Kingdom slots at every UK-licensed casino operator of meaningful scale that carries Pragmatic Play content — which covers effectively every Tier-1 UK operator. William Hill, Ladbrokes, bet365 Casino, Sky Vegas, PlayOJO, LeoVegas, Mr Green, 32Red, Casumo, Mr Vegas, BetVictor and virtually every major UK operator group carries the Big Bass franchise alongside Floating Dragon and the broader Reel Kingdom catalogue. To play at a UK-licensed operator, you need to complete UKGC identity and age verification before first deposit, plus affordability screening at most major operator groups. Because Reel Kingdom distributes exclusively through Pragmatic Play, the content appears under Pragmatic Play's provider branding at casino lobbies rather than a separate Reel Kingdom filter. Players searching for "Reel Kingdom slots" should filter for Pragmatic Play and then look for Big Bass, Floating Dragon or Hot to Burn franchise titles. UK-licensed casino bonuses tied to Reel Kingdom releases concentrate heavily on the Big Bass franchise — Big Bass Bonanza and Big Bass Splash welcome-spin offers are among the most common UK casino promotions, commonly valued at £0.10 per spin. MrQ, William Hill, PlayOJO and most major UK operators run Big Bass-specific welcome promotions. For another UK-focused studio with extensive franchise promotions, see our Eyecon slots guide covering Fluffy Favourites welcome spins.

Free Play and Demo Mode

You can access Reel Kingdom slots in demo mode at most UK-licensed casino lobbies that carry Pragmatic Play content, subject to age verification. Demo builds run the full certified math framework with virtual credits, which makes free play a reliable way to test the Fisherman Wild collect rhythm, Hold & Spin respin triggers and Ante Bet scatter-frequency impact before committing real stake. Demo games pre-load from the same HTML5 engine used for real money, so load times, mechanic behaviour and hit frequency match the live version. The published top-tier RTP runs by default on most demos, though the specific tier can vary — check the in-game info panel. Bonus buy options are accessible in demo mode outside UK-facing builds, letting non-UK players test the 100x-stake bonus entry pricing before committing real stake. UK-facing demo builds strip bonus buy under RTS 14A. The Big Bass franchise's well-defined collect rhythm and moderate bonus-trigger rate make demo mode particularly valuable for understanding session pacing before real-money play.

Reel Kingdom Slots on Mobile

You can load Reel Kingdom titles on mobile through any modern browser — Chrome, Safari, Firefox, Edge — without a dedicated app. The entire catalogue is built HTML5-first through Pragmatic Play's distribution engine, with mobile-first design as a core studio competency since founding. Every slot in the active portfolio runs on HTML5 optimised for load times inside three seconds on standard 4G. Data usage per session sits near 10–15MB. The engine supports iOS 13+, Android 8+, Chrome 85+ and Safari 14+, covering the vast majority of UK mobile devices in active use. Touch controls mirror desktop click actions. The 5x3 grid format of most Big Bass titles scales cleanly on mobile screens, and Floating Dragon's extended reel set with Hold & Spin lockdown displays legibly on 5-inch and larger screens. The Big Bass Bonanza Megaways 6-reel variable-row grid remains legible on standard mobile screens despite the added reel complexity.

Reel Kingdom Licensing and Fair Play

Reel Kingdom's regulatory compliance routes through Pragmatic Play's licence framework rather than separate per-studio licences. Pragmatic Play holds the UK Gambling Commission remote gambling software licence covering all UK-facing distribution of Reel Kingdom content. The Malta Gaming Authority B2B licence covers EEA distribution through Maltese-licensed operators. Additional jurisdiction-specific coverage spans Italy (ADM), Spain (DGOJ), Sweden (Spelinspektionen), Romania (ONJN), Greece (Hellenic Gaming Commission), plus North American provincial markets (Ontario via AGCO, New Jersey DGE). The UKGC framework demands RNG re-testing, volatility disclosure, reality-check messaging, affordability hooks, and the RTS 14A prohibition on bonus buys. The MGA B2B licence covers EEA distribution under player-protection fund contributions and AML controls. RNG certification routes through eCOGRA on a per-title basis, with certificates published through Pragmatic Play's B2B compliance portal.

Responsible Gambling

Reel Kingdom builds responsible gambling hooks directly into every HTML5 slot build at the front-end client level. Session time tracking, loss-limit messaging and UKGC-mandated reality checks fire consistently across every UK-licensed casino running the same build. Reel Kingdom titles are for players aged 18 and over only — no slot will load at a UK-licensed operator without completed age verification. You can set deposit limits, loss limits, wager limits, session time limits and cooling-off periods directly inside the casino account dashboard at any UKGC-licensed operator. Permanent self-exclusion is available through the operator's own scheme and through GAMSTOP, the national self-exclusion register that blocks access across every UKGC-licensed operator in a single registration. If Big Bass collect-mechanic chasing or Hold & Spin respin hunting has started to feel compulsive — hiding sessions, chasing losses, borrowing to fund play — stop, close the session and contact GamCare or BeGambleAware for free, confidential support. The high-volatility profile across most Reel Kingdom flagships means extended dry runs between bonus triggers are mathematically expected — session budgets matter more here than at medium-variance studios.