About Yggdrasil Gaming
Yggdrasil is worth exploring if you like a slot that changes as a round unfolds. Opening reel spaces and rising multipliers are a big part of its appeal.
A win might open up more of the reels. Keep winning in another game and your multiplier can double, then double again. Elsewhere, you get to uncover the extras that will be waiting for you in the free spins.
I'm more interested in those changes than another new backdrop.
Yggdrasil was founded in 2013 and has Swedish roots, with its licensed gaming business based in Malta. Yggdrasil Gaming Limited has held its Gambling Commission licence since December 2015.
The developer has kept returning to its own game families while introducing different features. Vikings Go Berzerk arrived in 2016; Hades brought large GigaBlox symbols in 2020. Those aren't just different themes: one builds around individual character meters, the other around the blocks landing on the reels.
That mix of returning series and new mechanics gives Yggdrasil a recognisable identity. You can follow a familiar cast of characters, or look for a feature name you've enjoyed in another game.
GigaBlox and DoubleMax: What Changes on the Reels?
You may see names such as GigaBlox and DoubleMax when browsing Yggdrasil slots.
GigaBlox is the easier one to spot. Instead of every space holding a separate symbol, matching symbols can arrive as one big block covering several positions. Hades uses blocks ranging from 2x2 right up to 6x6. When one of the big ones lands, you won't exactly have to squint to find it.
DoubleMax doubles the multiplier through consecutive wins: 1x becomes 2x, then 4x. Raptor DoubleMax pairs it with cascades, removing winning symbols and dropping replacements into the gaps. If those replacements win, the higher multiplier applies.
A GigaBlox game still has its own paytable and bonus rules; the blocks are a shared feature, not a complete game format. Likewise, DoubleMax describes the doubling multiplier. It doesn't mean that every game carrying the name has the same reels or free-spins round.
Yggdrasil Games and YGG Masters
YGG Masters games are made by independent studios and released in partnership with Yggdrasil. 4ThePlayer's 4K Ultra Gold is one example. A Yggdrasil label in a casino lobby can therefore cover games from more than one developer.
The studio credit is useful if you want more games from the same team.
Playing Yggdrasil Games on Mobile
Yggdrasil develops for phones as well as computers. Its mobile-compatible games can be opened through a casino's mobile website, with no separate download for each title. A casino app is another route where the game is included.
This applies to older games as well as recent releases: Vikings Go Berzerk is mobile-optimised, and Hades also supports mobile play.
Sequels, RTP and Volatility
Yggdrasil often returns to a successful game name, but a sequel can change more than the artwork. Raptor 2 DoubleMax keeps the original's doubling multiplier and adds a free-spins feature in which the reels can expand up to a 5x7 layout.
Vikings Go Berzerk Reloaded is likewise a separate release from the original Vikings Go Berzerk. The full title matters if you're looking for a particular free-spins feature, rather than simply another game with the same characters.
RTP settings can differ too. Vikings Go To Vegas, for example, has 94% and 90.5% versions. The information screen in the game you've opened gives you the relevant percentage, which may not match a figure quoted for another version.
That percentage is a theoretical long-term average. Volatility is a separate measure of how the results can vary: games with larger, less frequent prizes tend to be more volatile. Yggdrasil rates Hades high and Vikings Go Berzerk medium-high, so there isn't one rating for the whole catalogue.
Yggdrasil Jackpots and Table Games
Yggdrasil makes both progressive jackpot slots and ordinary slots with fixed top prizes. A progressive prize grows before it is won; a maximum-win figure is a cap on a game's payout, not necessarily a separate pot.
Joker Millions has a pooled progressive jackpot. Holmes & the Stolen Stones has five local progressive jackpots instead. They are different jackpot arrangements, so the current amounts need to be read in the game you are playing rather than taken from an old win story.
Beyond slots, Yggdrasil has developed computer-dealt blackjack and roulette games. Golden Chip Roulette is one of its roulette titles, adding random multipliers to straight-up bets on individual numbers.
Those are software-based table games, not a live dealer on a video stream. They offer a different format from the slots, although the expanding reels and feature-led game families remain the main attraction for me.
Best Yggdrasil Slots to Try
Vikings Go Berzerk
Game Information
Vikings Go Berzerk has five reels, four rows and 25 paylines. Each Viking has a rage meter, filled by wins involving that character.
A full meter triggers free spins with that Viking in Berzerk mode: he defeats the siren and becomes a sticky wild for the rest of the feature. Ragnarok puts all four Vikings into Berzerk mode. I like the individual character meters; you can see which Viking is changing the bonus.
Valley of the Gods
Game Information
Valley of the Gods starts with blocked spaces and 45 ways to win. Qualifying wins open more positions before a respin, with up to 3,125 ways when the full playing area is available.
Unlocking the whole area also brings multipliers and extra lives; an extra life can keep a respin sequence going when it would otherwise end. The changing layout is the feature here, rather than a separate bonus screen.
Golden Fish Tank
Game Information
Golden Fish Tank has five reels and 20 paylines. Three or more free-spin symbols trigger the feature, but first you pick objects from the bottom of the tank to reveal its extras.
Those picks can add spins, wilds, multipliers or symbol changes. You discover the bonus setup before the free spins begin; the objects don't reveal in advance which prize they hold.
Hades Gigablox
Game Information
Hades arrived in 2020 with 50 paylines and GigaBlox symbols covering anything from 2x2 to 6x6 positions. It adds Wild Hunt features and a Cerberus multiplier to those oversized blocks.
The blocks make the game immediately recognisable. For me, that is a stronger visual idea than simply adding more small symbols to a bigger grid.
Raptor DoubleMax
Game Information
Raptor DoubleMax removes winning symbols, drops replacements into the gaps and adds a wild. Another win continues the sequence and doubles the multiplier: 1x becomes 2x, then 4x.
The base-game multiplier resets when the sequence ends.
Holmes & the Stolen Stones
Game Information
Holmes & the Stolen Stones came out in 2015. It has five reels, 20 paylines and five local progressive jackpots, with coloured stones and shards tied to the features.
During Jackpot Free Spins, collecting five diamond stones of the same colour wins the jackpot linked to that colour. The colour matching gives the jackpot round a clear target.
From expanding reels to progressive jackpots, Yggdrasil has plenty to explore. Try the available demos, then compare our recommended UK Yggdrasil casinos for current games and offers.
FAQ
What are Yggdrasil's GigaBlox and DoubleMax features?
GigaBlox puts oversized blocks of matching symbols across several reel positions, as in Hades. DoubleMax doubles a multiplier through consecutive wins, as in Raptor DoubleMax. These names identify recurring features; each game still has its own bonus rules.
Are YGG Masters games made by Yggdrasil?
They are made by independent studios working with Yggdrasil through its YGG Masters programme. A casino's Yggdrasil selection can therefore include games from other developers. The studio credit helps you identify who actually made a particular title.
Can I play Yggdrasil slots for free?
Yes. The available demos use virtual credits, so you can try the features without staking cash. Demo winnings have no cash value and can't be withdrawn.
Can I play Yggdrasil games on my phone?
Yes. Yggdrasil develops games for mobile as well as desktop. Open a supported title through your casino's mobile website or an app that includes it; there is no separate download needed for each slot.
Do all Yggdrasil slots have the same RTP?
No. RTP varies by game and sometimes by version. The game's information screen gives its RTP, a theoretical long-term average rather than a promise for one session.
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