A win in Raptor DoubleMax can start a cascade with a growing multiplier. In Valley of the Gods, winning combinations open more of the playing area. Below, five Yggdrasil slots are compared by their game features and published RTP figures, with UK casino options to explore alongside them.
UK casinos with Yggdrasil games
If you want to play Yggdrasil games, the casino reviews below cover relevant UK slot sites. Compare the operator’s terms and account features, then search its lobby for the exact title. The games available vary between casino sites.
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Yggdrasil slot demos and mobile play
Demo games use virtual credits. There are no real-money stakes or cash prizes. 18+.
You have viewed 8 of 138 games!
For new players, a demo is a useful place to learn a slot game’s controls. Open the help screen before spinning. Raptor DoubleMax’s multiplier is easier to follow once you know what happens after each winning cascade; Valley of the Gods asks you to watch the blocked spaces around the symbols. Our free demo slots directory is another starting point for browsing online slots by provider.
On a phone, check whether the paytable is readable and the stake controls are easy to use. Demo availability depends on your location, and demo results cannot predict a real-money session.
Five Yggdrasil slots worth comparing
Vikings Go Berzerk
The four characters in Vikings Go Berzerk each have a rage meter. Wins involving a Viking raise that character’s meter. Fill it and the game awards free spins with that Viking in Berzerk Mode, where it wins its fights and becomes a sticky wild for the rest of the round.
The original 2016 slot uses five reels, four rows and 25 paylines. It is a useful introduction to the Vikings slot series, but the later Vikings Go Berzerk Reloaded adds features of its own, including wild multipliers up to 8x during free spins.
Valley of the Gods
Blocked positions are central to Valley of the Gods. A win brings a respin, and winning combinations help clear space on the game board. As the area opens, more ways become available, up to 3,125.
Clearing the whole area brings lives and win multipliers into play. The changing board gives this Egyptian-themed slot a different rhythm from a fixed payline game: progress is visible in the spaces you have opened.
Valley of the Gods 2
Valley of the Gods 2 starts with 240 ways and can reach 20,160 as wins remove blocker stones. Once the stones are gone, the feature set includes extra lives for respins, a multiplier and a Wild Reel that turns an entire reel wild.
The larger ways count describes the combinations available on the expanded board. It does not establish that the sequel wins more often than the original.
Raptor DoubleMax
After a win in Raptor DoubleMax, the winning symbols disappear and replacements fall into the gaps. An extra wild is added after each cascade. Consecutive wins double the multiplier, moving through 1x, 2x, 4x, 8x and onwards.
This prehistoric slot uses 25 paylines. DoubleMax refers to the doubling multiplier; the added wild can help form the next winning combination.
Lucky Neko GigaBlox
The Japanese setting of Lucky Neko GigaBlox uses cats and daruma dolls. Its defining feature is the size of the symbols: GigaBlox occupy several positions at once, and Yggdrasil describes blocks as large as 6×6 in the free spins feature.
That makes the shape of the symbol blocks the detail to watch, rather than a sequence of doubling multipliers. The official page rates Lucky Neko as high volatility; large symbols should not be mistaken for frequent payouts.
DoubleMax, GigaBlox and other Yggdrasil gaming mechanics
Yggdrasil calls its recurring systems Game Engagement Mechanics, or GEMs. The names appear across different slot themes, so recognising one can help you understand the feature being advertised.
DoubleMax doubles a multiplier through consecutive wins. GigaBlox changes the size of symbols on the reels. MultiMax works differently again: in Multifly! MultiMax, wilds increase individual reel multipliers, and the multipliers on the reels involved in a winning combination apply to that win.
A shared mechanic gives you a clue about the gameplay, but each slot still has its own base game, bonus triggers and payout rules. That is especially useful when comparing a new slot with an earlier title carrying the same GEM name.
About Yggdrasil Gaming
Founded in 2013, Yggdrasil Gaming is a slot provider making online casino games and supplying technology to other studios. Its portfolio extends beyond the Vikings series, with Egyptian, Japanese and prehistoric settings among the examples above.
The YGG Masters programme helps independent developers produce and distribute games through Yggdrasil’s technology and network. For example, Yggdrasil identifies 4 Fantastic Vikings Go Fishing as a 4ThePlayer crossover. A game appearing in Yggdrasil Gaming’s wider catalogue is therefore not necessarily an in-house production.
Our casino game providers guide covers other studios and the distinction between the companies making games and the casinos offering them.
UK and Malta supplier licences
Yggdrasil Gaming Sweden AB holds an active UK Gambling Commission remote gambling software licence, under account 50632. Yggdrasil Gaming Limited, account 44137, holds an active remote casino licence; Yggdrasil describes its role as B2B game hosting and supply.
The company also lists Malta Gaming Authority B2B licence MGA/B2B/230/2012 on its website. These are supplier details. The online casino managing your deposits and withdrawals has its own operator licence to check.
Yggdrasil RTP and volatility
The official game pages linked above publish these figures for the named editions.
| Game | Published RTP | Published volatility |
|---|---|---|
| Vikings Go Berzerk | 96.1% | Medium–high |
| Valley of the Gods | 96.2% | High |
| Valley of the Gods 2 | 96.0% | High |
| Raptor DoubleMax | 96.0% | High |
| Lucky Neko GigaBlox | 96.4% | High |
Some later releases explicitly list several configurations. The official Raptor 2 page, for example, lists 97%, 96%, 94% and 90.5% RTP. Check the help screen in the game offered by your casino to find which version you are using.
RTP is a theoretical return across a very large volume of play. Two slots with the same RTP can distribute their wins differently, which is where volatility matters. Neither measure tells you when a bonus will arrive or how much a particular session will return.
Set a spending limit before playing and stop when you reach it. Our responsible gambling guide explains the available tools and support.
Casino offers and Yggdrasil free spins
A free-spins round inside Vikings Go Berzerk follows the game’s rules. Free spins offered to new customers by a casino follow the promotion’s terms instead. If you are choosing a site for a particular Yggdrasil title, check which selected games the offer covers: a casino can carry that slot without including it in the promotion.
Yggdrasil questions
Does Yggdrasil have one RTP for all its slots?
No. The published returns vary between games, and some titles have several RTP configurations. A percentage quoted for Raptor DoubleMax should not be applied to Raptor 2 or to the entire catalogue.
Why can a global game page show Buy Bonus when a UK version does not?
Yggdrasil’s international pages describe features for more than one market. The Gambling Commission’s games warning records that operators removed feature buy-ins following its intervention. A paid shortcut shown on a global product page is not a promise of the same option at a UK casino.
Is a max win the same as a jackpot?
A max win puts a ceiling on a slot’s win potential under its rules. Jackpots have their own triggers and conditions and may be fixed or progressive. Raptor 2, for example, publishes a max win of 9,493x. That figure describes the payout limit, not a growing jackpot or the likelihood of reaching it.
Daniel is a content creator at Mr Win and has worked in the iGaming industry since 2012. With more than a decade of experience reviewing casino operators and bonuses, he focuses on safe play, licensing standards, and helping players find fair gaming sites.
Fact checked by: Greg – Casino expert. Last fact-checked: September 30, 2026.