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Best Yggdrasil Slots & Casinos: Top 10 Games Ranked
Yggdrasil is the Maltese slot studio founded in 2013 by Fredrik Elmqvist, the former CEO of NetEnt. The studio quickly established itself with mechanically inventive titles — Holmes and the Stolen Stones (the highest-RTP local progressive jackpot in the UK at 96.80%), Empire Fortune (the network progressive), Vikings Go Berzerk and the breakthrough Jokerizer (98.05% RTP). Acquired by Bragg Gaming Group in 2024, Yggdrasil continues to ship boutique-quality slots under its own identity. We've ranked the top 10 Yggdrasil slots and picked the UK casinos with the deepest libraries.
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How We Rank
How we ranked the best Yggdrasil slots
Yggdrasil ships fewer slots than mainstream competitors (around 6–10 per year vs Pragmatic’s 30+) but with consistently higher individual production values. Our ranking process applies six criteria specific to the Yggdrasil catalogue:
Criteria
What we look for
RTP verification
Yggdrasil publishes RTP figures for every title and tends to ship at a single RTP version rather than multiple variants — easier to verify than competitors like Pragmatic Play.
Jackpot eligibility
Yggdrasil runs both a network progressive (Empire Fortune) and a local progressive (Holmes and the Stolen Stones). We rate jackpot-network slots separately from standalone games.
Production values
Yggdrasil is known for cinema-quality visuals and elaborate themes. We rate aesthetics alongside mechanics — boutique-studio appeal is part of the brand.
Series consistency
The Vikings series (Vikings Go Berzerk, Vikings Go Wild, Vikings Unleashed Megaways) and the Cazino series are Yggdrasil’s recurring IPs. We weight series strength alongside standalone hits.
UK availability
Yggdrasil distributes through its GATI platform which is integrated at most major UK casinos. We confirm availability across multiple UKGC-licensed sites.
Volatility profile
Yggdrasil leans high-volatility on most modern releases. We flag the few lower-volatility entries (Jokerizer, Sunny Shores) for players preferring steadier sessions.
About Yggdrasil
About Yggdrasil
Yggdrasil was founded in 2013 in Malta by Fredrik Elmqvist, the former CEO of NetEnt. Elmqvist’s departure from NetEnt and subsequent founding of a direct competitor was one of the higher-profile moves in modern online gambling — Yggdrasil’s entire studio identity was built on the idea of making the kind of artisan-quality slots that NetEnt had been moving away from.
The Norse-mythology positioning
The name “Yggdrasil” refers to the world-tree from Norse mythology — a deliberate signal that the studio would lean into the visual and thematic depth associated with the genre. The Vikings series (launched in 2016) became the studio’s flagship IP, with multiple sequels and Megaways adaptations following over the next decade.
Boutique scale, mechanic-led identity
Where competitors like Pragmatic Play ship 30+ slots a year, Yggdrasil’s release cadence is closer to 6–10 per year. The studio’s commercial pitch has been “fewer but better” — high production values, mechanic invention, and a focus on titles that hold up over multiple years. Holmes and the Stolen Stones (2016), Empire Fortune (2017) and Vikings Go Berzerk (2016) all remain in active UK rotation a decade after release.
The GATI platform
Beyond games, Yggdrasil developed the GATI (Game Adaptation Tools and Interfaces) platform — a content-distribution and integration layer used by multiple third-party slot studios. GATI lets smaller studios deliver content into Yggdrasil-integrated casinos without each one needing their own direct casino integrations. The platform now powers a significant portion of Yggdrasil’s revenue, independent of the studio’s own slot catalogue.
Bragg Gaming Group acquisition
Yggdrasil was acquired by Bragg Gaming Group in 2024 (after earlier discussions about a sale to Abelson Info). Bragg is a Toronto-listed gaming-content business; the acquisition placed Yggdrasil inside a multi-studio group while retaining the brand’s creative independence. As of 2026 the studio continues to ship under the Yggdrasil name with the original creative team largely intact.
Top 10
The 10 best Yggdrasil slots in 2026
Ranked by RTP, max-win potential, mechanic quality and longevity. Yggdrasil’s catalogue is small but the average quality is exceptionally high — almost every entry on this list has been in continuous UK rotation since release.
1. Holmes and the Stolen Stones
Stat
Detail
RTP
96.80%
Jackpot
Local progressive
Volatility
Medium
Max win
Progressive (typically £10k–£500k for top tier)
Release year
2016
Standout feature
Sherlock-themed Sticky Stones bonus — the highest-RTP local progressive jackpot in the UK market
The highest-RTP local progressive jackpot slot at any UKGC-licensed casino. Sherlock Holmes theme, three-tier local jackpot pool (typically resetting at £10k for the Mini tier and reaching £500k+ for the Major), and a Sticky Stones bonus mechanic that builds across the base game. Cited in our jackpot slots guide as the value-conscious player’s pick for jackpot eligibility.
2. Empire Fortune
Stat
Detail
RTP
96.40%
Jackpot
Network progressive (Empire / Royal / Local tiers)
Volatility
Medium-high
Max win
Progressive (Empire tier seeded above £500k)
Release year
2017
Yggdrasil’s flagship network progressive. Three-tier structure with the Empire tier regularly seeded above £500k. Base RTP of 96.40% is one of the highest of any network jackpot slot — second only to Mega Fortune (96.60%) and Holmes and the Stolen Stones (96.80%, local). Pyramid theme; the jackpot bonus triggers via a coin-collection mechanic.
3. Jokerizer
Stat
Detail
RTP
98.05%
Volatility
Low
Max win
1,000x
Release year
2014
Standout feature
Jokerizer mode — choose to gamble winnings into a higher-RTP bonus mode
Yggdrasil’s highest-RTP slot at 98.05% and one of the highest-RTP slots anywhere in the UK market — Joker theme, three-reel grid, and an opt-in Jokerizer mode that pushes effective RTP higher when used optimally. Low max win (1,000x) but the elite RTP combined with low volatility makes it one of the strongest options for bonus wagering clears.
4. Vikings Go Berzerk
Stat
Detail
RTP
96.10%
Volatility
High
Max win
15,000x
Release year
2016
Standout feature
Berzerk mode — Vikings symbols transform into stickly wilds for the duration of free spins
The headline slot of Yggdrasil’s Vikings series. Berzerk mode in free spins transforms Viking characters into sticky wilds, with each Viking’s “berzerk” trigger building up over the bonus round. High-volatility, high-quality production. The series sequel Vikings Go Wild uses the same engine with slightly different mechanics.
5. Vikings Unleashed Megaways
Stat
Detail
RTP
96.10%
Volatility
Very high
Max win
21,975x
Ways to win
Up to 117,649
Release year
2019
Standout feature
Megaways engine licensed from BTG, applied to the Vikings IP
Yggdrasil’s Megaways adaptation of the Vikings franchise. Combines Yggdrasil’s signature production quality with the Megaways engine licensed from Big Time Gaming. The 21,975x max win is among the higher ceilings in Yggdrasil’s catalogue. See our Megaways slots guide for the format in general.
6. Valley of the Gods
Stat
Detail
RTP
96.20%
Volatility
High
Max win
5,250x
Release year
2017
Standout feature
Egyptian-theme with re-spin mechanic and disappearing-symbol cascades
One of Yggdrasil’s strongest Egyptian-theme entries. Combines re-spins, disappearing symbols and a multiplier ladder for chained wins. Lower max-win ceiling than Vikings Unleashed but more frequent bonus triggers. Recently followed by Valley of the Gods 2 (2021) with similar mechanics.
7. Hammer of Vulcan
Stat
Detail
RTP
96.20%
Volatility
Very high
Max win
20,000x
Release year
2021
Standout feature
MultiMax mechanic licensed from BTG — multipliers persist across re-spins
Yggdrasil’s MultiMax-licensed title. Roman-mythology theme, very high volatility, and a multiplier mechanic that persists across re-spins for chained big wins. One of Yggdrasil’s biggest-max-win modern releases.
8. Cazino Cosmos
Stat
Detail
RTP
97.10%
Volatility
Medium
Max win
4,000x
Release year
2017
Standout feature
Vegas-cosmos theme with sticky-wild collection across free spins
The third-highest-RTP slot in Yggdrasil’s catalogue at 97.10%. The Cazino series (Cazino Zeppelin, Cazino Cosmos, Cazino Brillante) has been one of Yggdrasil’s quieter long-running franchises — high production values and reliable maths without the flagship visibility of the Vikings series.
9. Lucha Maniacs
Stat
Detail
RTP
96.50%
Volatility
High
Max win
5,000x
Release year
2018
Standout feature
Mexican-wrestling theme with three free-spin modes and character-specific bonuses
Yggdrasil’s character-driven free-spins ladder, applied to a Mexican-wrestling theme. Three free-spin modes each trigger a different bonus mechanic. Strong production values; Lucha Maniacs 2 (2021) followed with similar structure.
10. Vault of Anubis
Stat
Detail
RTP
96.10%
Volatility
High
Max win
10,000x
Release year
2020
Standout feature
Egyptian-theme cluster mechanic with symbol-collection bonus
One of Yggdrasil’s newer Egyptian entries, using a cluster-pays mechanic with symbol collection across the base game. Higher max win than Valley of the Gods (10,000x vs 5,250x) and a more aggressive bonus structure.
Highest RTP
Highest-RTP Yggdrasil slots
Yggdrasil’s catalogue is concentrated around the 96.10–96.50% RTP band — competitive with the industry standard but with a notable elite-RTP outlier in Jokerizer (98.05%). Ranked by published RTP:
Slot
RTP
Volatility
Notable feature
Jokerizer
98.05%
Low
Opt-in higher-RTP bonus mode
Cazino Cosmos
97.10%
Medium
Sticky wild collection
Beauty and the Beast
96.79%
Medium-high
Fairy-tale theme with picker bonus
Holmes and the Stolen Stones
96.80%
Medium
Local progressive jackpot
Lucha Maniacs
96.50%
High
Three free-spin modes
Empire Fortune (base)
96.40%
Medium-high
Network progressive jackpot
Vault of Anubis
96.10%
High
Cluster mechanic
Hammer of Vulcan
96.20%
Very high
MultiMax licensed from BTG
Valley of the Gods
96.20%
High
Re-spins + cascading symbols
Vikings Go Berzerk
96.10%
High
Berzerk-mode sticky wilds
For pure expected-value play, Jokerizer at 98.05% leads the catalogue by a clear margin. For high-RTP slots with modern mechanics, Cazino Cosmos (97.10%) and Holmes and the Stolen Stones (96.80% with local progressive) are the strongest combinations. See our high RTP slots guide for the cross-provider context.
Yggdrasil’s two jackpot networks
Unusual for a boutique-scale slot studio, Yggdrasil operates two distinct jackpot networks that target different player profiles. Both are worth understanding separately.
Empire Fortune (network progressive)
Yggdrasil’s main network progressive jackpot. Three-tier structure (Empire, Royal, Local) with the Empire tier regularly seeded above £500,000 and growing through wagers across all participating UK casinos. Empire Fortune slot is the flagship feeder; other Yggdrasil titles may rotate in and out of the network depending on the casino. Base RTP of 96.40% — significantly higher than competitor network jackpots like Mega Moolah (88.12%), making it one of the most value-conscious network jackpot options in the UK market.
Holmes and the Stolen Stones (local progressive)
Yggdrasil’s standalone local progressive slot. Wagers pool within each casino rather than across all casinos — smaller jackpots (typically £10,000–£500,000 for the Major tier) but much more frequent hits. Base RTP of 96.80% is the highest of any local progressive jackpot slot at any UKGC-licensed casino. Sherlock Holmes theme, three-tier local pool (Mini, Major, Mega).
Players wanting more frequent jackpot triggers without sacrificing base RTP
For broader jackpot context (Mega Moolah, Age of the Gods, Mega Fortune), see our jackpot slots guide. Yggdrasil’s two-network approach is unusual — most slot studios run either a network progressive (Microgaming’s Mega Moolah, NetEnt’s Mega Fortune, Playtech’s Age of the Gods) or local progressives, not both.
Yggdrasil’s signature mechanics and the GATI platform
Yggdrasil’s slot-side identity rests on a small set of recurring mechanics plus a unique distribution play in the GATI platform.
BOOST! — promotional tournament network
Yggdrasil’s tournament and missions framework, deployed across all Yggdrasil-powered UK casinos. BOOST! runs continuously, with cash prizes paid wager-free for slot tournament leaderboards and missions. The network is structurally similar to Pragmatic Play’s Drops & Wins but operates exclusively across Yggdrasil’s catalogue.
The Vikings series
Yggdrasil’s flagship recurring IP. Vikings Go Berzerk (2016) led the franchise; Vikings Go Wild (2016), Vikings Unleashed Megaways (2019, BTG-licensed Megaways) and Vikings Go to Hell (2019) followed. The series uses a recurring sticky-wild and Berzerk-mode mechanic that’s now a signature of the studio.
BTG mechanic licensing
Yggdrasil licenses several mechanics from Big Time Gaming for use in its own slots. Vikings Unleashed Megaways uses the Megaways engine; Hammer of Vulcan uses the MultiMax mechanic. This makes Yggdrasil one of the more active BTG licensees outside the major mainstream studios.
GATI — the distribution backbone
Beyond its own catalogue, Yggdrasil developed the GATI (Game Adaptation Tools and Interfaces) platform — a content-distribution and integration layer used by multiple third-party studios. Smaller studios distribute their slots through GATI into Yggdrasil-integrated casinos without needing direct casino integrations. The platform now powers a significant portion of Yggdrasil’s revenue independent of its own slot output, and contributes to the studio’s commercial resilience.
Cinematic production values
Less a mechanic than a brand position — Yggdrasil’s slots consistently rank among the most visually elaborate in the UK market. The studio invests heavily in animation, 3D rendering and bespoke art for each release. This is the source of the “boutique studio” reputation; Yggdrasil ships fewer slots than competitors but invests more per release.
Where To Play
Where to play Yggdrasil slots in the UK
Yggdrasil distributes through its GATI platform to many major UK casinos, so the catalogue is broadly available. The following sites stand out for Yggdrasil players specifically:
Mr Vegas — carries the full Yggdrasil catalogue including Empire Fortune, Holmes and the Stolen Stones, and the Vikings series. 5,500+ slot library overall with PayPal-friendly fast withdrawals.
Casumo — particularly strong on the Yggdrasil Vikings series and Empire Fortune network jackpot. Pairs Yggdrasil play with the wager-free Reel Races promotional structure.
PlayOJO — full Yggdrasil catalogue with PlayOJO’s signature “no wagering ever” approach to bonuses. Particularly strong for Holmes and the Stolen Stones local jackpot play.
bet365 Casino — comprehensive Yggdrasil selection with industry-leading withdrawal speeds on PayPal.
BetMGM Casino — carries the full Yggdrasil catalogue with the studio’s RTP transparency policy applying to Yggdrasil titles too.
Welcome bonus eligibility for Yggdrasil slots
Most UK casinos accept Yggdrasil slots for welcome-bonus play, though check the bonus T&Cs — Empire Fortune and other jackpot-network slots are sometimes excluded due to their network-jackpot funding. Standard Yggdrasil titles (Jokerizer, Vikings Go Berzerk, Valley of the Gods) are universally eligible.
Mobile and UK availability
Every Yggdrasil slot is HTML5-native and runs on iOS and Android browsers without a dedicated app. Yggdrasil’s signature production values translate well to mobile — the animation and 3D rendering work that distinguishes the studio’s slots on desktop is equally polished on mobile devices. Recent releases use portrait-orientation layouts; older titles have been retrofitted for mobile.
Pros and cons of playing Yggdrasil slots
Yggdrasil is one of the most respected boutique studios in UK online slots — small catalogue, high quality. Here’s an honest balance of what that means in practice.
Pros
Industry-leading jackpot value — Holmes and the Stolen Stones holds the highest base RTP of any local progressive jackpot in the UK (96.80%); Empire Fortune at 96.40% is among the highest base RTPs of any network progressive.
Cinematic production values — Yggdrasil's slots consistently rank among the most visually elaborate in the UK market, with bespoke animation and 3D rendering that competitors rarely match.
Elite-RTP outlier in Jokerizer (98.05%) — one of the highest published RTPs at any UKGC-licensed slot, with low volatility for extended-session play.
Long-running series with consistent quality — Vikings, Cazino, Lucha series all have multiple entries that have aged well. Players who like one Yggdrasil title can confidently explore the catalogue.
Cons
Small catalogue — Yggdrasil ships 6–10 slots per year vs Pragmatic Play's 30+. Players who want constant new releases will find the studio's cadence limiting.
High volatility as standard — most Yggdrasil titles run hot. Casual players on tight bankrolls should stick to the few low-volatility entries (Jokerizer, Sunny Shores) rather than the flagship high-variance hits.
Smaller jackpot pools than competitors — Empire Fortune's seeded Empire tier is around £500k, well below Mega Moolah's typical multi-million pool. The trade-off for higher base RTP is smaller top-tier prizes.
Recent ownership change (Bragg, 2024) — too early to tell how the acquisition will affect long-term creative direction or release cadence. Track record over the past 18 months suggests business as usual, but worth monitoring.
Yggdrasil versus Others
Yggdrasil versus NetEnt
This is the most personal comparison in UK online slots. NetEnt was the studio Yggdrasil’s founder Fredrik Elmqvist ran as CEO before leaving to start Yggdrasil in 2013. The two studios are direct competitors, and Yggdrasil’s identity was built on the boutique-quality approach that NetEnt had been moving away from.
The practical differences in 2026: NetEnt has the bigger catalogue (200+ slots vs Yggdrasil’s ~60), more recognisable franchises (Starburst, Gonzo’s Quest, Dead or Alive 2), and stronger low-volatility presence. Yggdrasil wins on per-release production quality and jackpot-RTP balance (Empire Fortune at 96.40% beats NetEnt’s Mega Fortune at 96.60% in availability and frequency, even if the headline jackpots are smaller). Both providers are stocked at every major UK casino — most serious slot players keep both in regular rotation.
Yggdrasil versus Pragmatic Play
Pragmatic Play represents the polar opposite of Yggdrasil’s approach — ship 30+ slots per year, dominate UK player taste through frequency and the Drops & Wins network promo, and prioritise breadth over individual-title craft. Yggdrasil ships less but invests more per release, with a focus on staying-power titles rather than the constant-novelty model.
For UK players the choice usually isn’t either/or — both studios are stocked at every major casino. Pragmatic Play for the latest tumble-mechanic hit (Sweet Bonanza, Gates of Olympus); Yggdrasil for an evening’s session on a slot that holds up over time (Holmes, Vikings Go Berzerk, Jokerizer).
Yggdrasil versus Microgaming
The comparison that matters most in the jackpot category. Microgaming‘s Mega Moolah network is the biggest in online gambling history — over £1.6 billion in lifetime jackpot wins, with the largest single online slot win on record (£19.4m). Yggdrasil‘s Empire Fortune network is much smaller in headline jackpot size but considerably higher in base RTP (96.40% vs Mega Moolah’s 88.12%).
The practical choice: Microgaming for once-in-a-decade life-changing wins; Yggdrasil for more value-conscious jackpot play with smaller-but-better-RTP economics. Players seeking the chance of multi-million-pound payouts go with Microgaming; players who play jackpot slots regularly and want the maths to work out long-term lean toward Yggdrasil.
Responsible gambling
Yggdrasil slots span a wide volatility range — from low-volatility classics like Jokerizer to very-high-volatility entries like Hammer of Vulcan. Across all of them, the casino always wins on average over the long run; the difference is how slowly. Set a budget before you start, never chase losses, and only gamble with money you can afford to lose.
All UK-licensed casinos are required by the UK Gambling Commission to offer a range of tools to help you stay in control:
Deposit limits: set a daily, weekly or monthly cap so you can’t deposit more than you’ve decided to spend.
Loss limits and session limits: automatically log out or stop play after a set time or loss amount.
Reality checks: on-screen reminders showing how long you’ve been playing and how much you’ve spent or won.
Time-out and self-exclusion: short cooling-off periods, or — through GamStop — full self-exclusion from every UKGC-licensed casino in the UK simultaneously.
If your gambling stops being fun, free, confidential help is available 24/7 from BeGambleAware or the National Gambling Helpline on 0808 8020 133.
You must be 18 or over to gamble. Always check the full terms of any bonus before opting in.
Jokerizer at 98.05% RTP — one of the highest published RTPs at any UKGC-licensed slot. Cazino Cosmos follows at 97.10%, and Holmes and the Stolen Stones at 96.80% (which is also the highest-RTP local progressive jackpot slot in the UK market). The rest of Yggdrasil’s catalogue clusters around the 96.10–96.50% range.
Yggdrasil was founded in 2013 in Malta by Fredrik Elmqvist, the former CEO of NetEnt. Elmqvist’s departure from NetEnt and immediate founding of a competing studio was one of the more notable executive moves in online gambling — Yggdrasil’s identity from day one was built on making the boutique-quality slots that NetEnt had moved away from at scale.
Empire Fortune is Yggdrasil’s flagship network progressive jackpot, with three tiers (Empire, Royal, Local). The Empire tier is regularly seeded above £500,000 and grows through wagers across all participating UK casinos. Base RTP is 96.40% — significantly higher than other major network jackpot slots like Mega Moolah (88.12%), making it one of the most value-conscious network jackpot options at UKGC-licensed casinos.
Yggdrasil was acquired by Bragg Gaming Group (Toronto-listed: BRAG) in 2024. The acquisition placed Yggdrasil inside a multi-studio gaming-content group while retaining the studio’s brand identity and creative independence. As of 2026 the original creative team is largely intact and the studio continues to ship under the Yggdrasil name with familiar release cadence.
Vikings Unleashed Megaways tops the catalogue at 21,975x your stake. Hammer of Vulcan reaches 20,000x; Vikings Go Berzerk caps at 15,000x; Vault of Anubis at 10,000x. The Empire Fortune jackpot network can produce much larger absolute payouts (£500k+) but the maths are progressive-jackpot rather than fixed-stake-multiplier. For pure max-win on a single spin, Vikings Unleashed Megaways leads.
Yes. Yggdrasil holds a UK Gambling Commission licence and its games are independently audited by accredited testing labs to confirm fair and random outcomes. Every Yggdrasil slot served at a UKGC-licensed UK casino displays its RTP in the in-game info screen, as UKGC compliance requires.
Yes. Every Yggdrasil slot is HTML5-native and runs on iOS and Android browsers without a dedicated app. Yggdrasil’s signature production quality — animation, 3D rendering, bespoke art — translates well to mobile, often better than competitors’ equivalent releases. Recent slots are portrait-orientation-native; older titles have been retrofitted to mobile.
GATI (Game Adaptation Tools and Interfaces) is Yggdrasil’s content-distribution platform. Smaller third-party slot studios distribute their games through GATI into Yggdrasil-integrated UK casinos, without needing direct casino integrations of their own. The platform now powers a significant portion of Yggdrasil’s revenue independent of the studio’s own slot catalogue, and contributes to the studio’s commercial resilience.
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Compare.bet's online gambling content experts helped write, edit and check this page:
Diarmuid is a seasoned betting expert, combining his deep knowledge of sport with a strong understanding of betting markets to deliver high-quality and informative content. He's dedicated to helping readers make more informed betting decisions and enjoy a better overall experience.
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