What style does Yggdrasil represent
Yggdrasil's machines are typically more visually elaborate than many competing developers' products. The studio often builds on animated transitions, layered bonus systems, and mechanics where a given symbol keeps changing throughout the spin itself.
This doesn't mean the machines are harder to play — it's more that the visual layer runs richer, and the bonus rounds build up over more steps than at cleaner-styled developers.
The four featured titles show this variety well: among them is an action-packed Viking-themed machine, a title built around ancient gods, and a more classic, collection-based slot.
The studio's portfolio is considerably wider than this; the Dukat.bet catalog features these four titles with publicly disclosed, verified RTP data from the manufacturer. This foursome is a good starting point for anyone just getting to know the developer's style before browsing the full list.
Vikings Go Berzerk and Valley of the Gods
Vikings Go Berzerk is the opening title in one of the studio's best-known series. It builds on a character-based bonus system: each Viking warrior triggers its own feature when it lands on the reels. The manufacturer-stated RTP is 96.10%, checked on 2026-09-22.
Valley of the Gods draws on an Egyptian theme, built around a distinctive mechanic in which symbols move downward across a pyramid-shaped grid. According to the manufacturer, its RTP is 96.30%. The main difference between the two machines is pace: Vikings Go Berzerk is more action-driven with quick bonus triggers, while Valley of the Gods works with a gradually building, more patient rhythm.
Rise of Olympus and Golden Fish Tank
Rise of Olympus puts the gods of Greek mythology — Zeus, Poseidon, Hades — front and center, with a cluster-pay system where neighboring groups of symbols count, rather than traditional paylines. The manufacturer-stated RTP is 96.30%, matching Valley of the Gods.
Golden Fish Tank brings a completely different mood: it's built around collecting fish swimming in an aquarium, with each fish carrying its own multiplier or feature. Its RTP, per the manufacturer, is 96.20%. This title offers a calmer, visually more relaxed experience than its mythology-themed counterparts.
The four Yggdrasil machines' RTP sits in a tight band, between 96.10% and 96.30%, which runs slightly higher than the average shown in the Red Tiger lineup — covered in detail on the Red Tiger page.
The four Yggdrasil titles compared
The table below sums up the theme, mechanic and RTP for each title at a glance.
| Game | Theme | RTP (per manufacturer) |
|---|---|---|
| Vikings Go Berzerk | Viking, character-based | 96.10% |
| Valley of the Gods | Egyptian, descending grid | 96.30% |
| Rise of Olympus | Greek mythology, cluster pays | 96.30% |
| Golden Fish Tank | Aquarium, collection-based | 96.20% |
If you're after a mythological theme, you can pick between Vikings Go Berzerk, Valley of the Gods and Rise of Olympus — each draws on a different culture, with a different bonus mechanic. If you prefer a calmer, less battle-driven mood, Golden Fish Tank offers an alternative.
The full filterable list is worth checking on the slots tab, where you can narrow it down to Yggdrasil machines by provider. For anyone browsing by category — classic, Megaways, jackpot — the slot categories page gives an overview.
To make the choice easier, the how to choose a slot guide lists practical considerations around volatility and theme selection, which can be especially useful if you're torn between Yggdrasil's and Red Tiger's portfolios.
It's worth remembering that RTP alone doesn't reveal how often or how large a machine pays out. The cluster-based Rise of Olympus typically pays less often but in bigger hits, while the collection-based Golden Fish Tank tends to produce steadier, smaller payouts over a longer run. This difference can matter more to the day-to-day experience than a tenth of a percentage point between the two machines' RTP figures.