Why we don’t sort Novomatic games by a number
Every ranking on dukat888.win rests on a single key that the studio itself has published: RTP, win cap, release date or bonus-buy price. With Novomatic, that foundation is missing. Greentube, the channel through which the group distributes its online games, does not list a return percentage on its public game pages, and it gives no release date either.
So this page is not a table of winners. It is an inventory of what we could verify as of 12 October 2026: who stands behind the brand, which game families carry its name in the Dukat.bet lobby, and which data stays locked behind a login for business partners.
That is also why Novomatic games barely show up in our RTP rankings. They are not excluded on principle – they simply lack a key we could use to place them fairly. How we handle a gap like this is set out in the ranking methodology.
The group and its online division at a glance
| Data point | What we found | Source |
|---|---|---|
| Founded | 1980, by entrepreneur Professor Johann F. Graf | studio’s official site |
| Legal form and seat | NOVOMATIC AG, joint-stock company, Gumpoldskirchen (Austria) | studio’s official site |
| Group size | around 26,000 employees, subsidiaries in roughly 50 countries | studio’s official site |
| Markets | by its own statement, regulated markets only | studio’s official site |
| Online division | Greentube, inside the group from 2010 | studio’s official site |
| RTP on the game page | not published (the data block ends with a client login prompt) | not published |
| Volatility | a bare number on a scale up to 5, scale not explained | studio’s official site |
| Max win | only for some newer Buy Bonus titles | studio’s official site |
| Release date | not published | not published |
| Demo in the Dukat.bet lobby | no, every title is tagged “Nodemoplay” | public Dukat.bet lobby |
The group’s website gives two different figures for the number of export countries, so we leave that out.
An Austrian group from 1980 and its internet arm
The company was set up in 1980 by entrepreneur Johann F. Graf. It grew on machines for arcades and casinos, and today it describes itself as a group operating exclusively in regulated markets.
Online games are handled by Greentube, which calls itself the group’s division for digital gaming and entertainment. It started in 1998 as a small firm, Dürrschmid&Reisinger OEG, with a 3D skiing game called Ski Challenge. In 2000 it took the name Greentube Internet Entertainment Solutions AG, and since 2010 it has belonged to the Novomatic group.
A detail that may interest Slovak readers: alongside Vienna, Graz and Las Vegas, Greentube lists an office in Bratislava. That changes nothing about the games themselves, though – the data is the same for every market.
What a single game page on the Greentube site tells you
We opened six Greentube game pages, and all of them share the same skeleton. The “Key Data” block shows volatility as a single number and, for a few newer titles, a win cap too. There is no RTP line anywhere – the block closes with a link to the client login.
| Game | RTP | Volatility | Win cap | Other data |
|---|---|---|---|---|
| Book of Ra deluxe Buy Bonus | not published | 5 | 50,000× the stake | feature hit rate 150 – 200 |
| Cash Connection – Golden Book of Ra | not published | 5 | not published | Grand Jackpot for 15 coins |
| Diamond Link: Mighty Sevens | not published | 3 | not published | full screen of sevens = 750× |
| Book of Ra deluxe | not published | 5 | not published | – |
A volatility of “5” sounds clear until you notice the page never says where the scale starts or what the midpoint means. You can’t compare it with the worded volatility labels other studios use – more on scales in the guide on how to read the ranking columns.
A demo does exist on greentube.com, but the button requires a login. For an ordinary player, that means one thing: you can’t try Novomatic before your first deposit, neither at the manufacturer nor at Dukat.bet.
Game families under the Novomatic name in the Dukat.bet lobby
The Dukat.bet lobby has a dedicated provider page for Novomatic, and it was working as of 12 October 2026. The titles fall roughly into families that overlap (a single game can be both a “Book” game and a “Buy Bonus” one).
- Book games – Book of Ra deluxe 6, Book of Ra Magic, Book of Luck, Book of Flames. Common ground: the book symbol triggers free games with an expanding symbol.
- Buy Bonus versions – purchasable free games on well-known titles, such as Faust, Golden Ark, Rise of Tut Magic, Gold Fever or Million Dollar Heist Xtreme.
- Hold & Win – Jackass Gold, 5 Sevens, Bonsai Gold, Thunder Vault, Giza Fortunes and more, including Christmas reskins.
- Hotfire – Ultra Hotfire, Three Hotfire, Double Devil's Hotfire, Phoenix Hotfire Xpand.
- Fruity “Hot” machines – Xtra Hot, Supra Hot, Always Hot, Hot Chance, Infinite Hot.
- Cash Connection – four titles built on Lock & Spin with four fixed jackpots.
- Diamond Link – a single representative in the lobby, Diamond Link Mighty Sevens.
- Piggy Prizes and Starlight Jackpots – Wand of Riches, Wish of Riches, Coins O'Plenty; Athena Goddess of War and Captains Catch.
- Multichance and Symbol Select – a handful of titles; we found no description of the Symbol Select mechanic on the official site, so we don’t describe it.
One important caveat. Of the titles the lobby files under Novomatic, only a minority have their own page on greentube.com. Whole series – Hold & Win, Hotfire, Jackass Gold, Book of Flames, 5 Sevens, Million Dollar Heist – we did not find on the Greentube site at all. Review sites attribute them to Novomatic, but there is no official confirmation of which studio within the group makes them. That is why we call them “Novomatic-branded games in the Dukat.bet lobby” rather than Greentube games.
And what is missing the other way round? Asian Fortunes, which Greentube lists on its site, did not turn up in the lobby.
Mechanics with an official description from the maker
For games whose page Greentube publishes, we can also describe how they work. We claim nothing beyond that.
The book symbol that expands
Three or more books trigger 10 free games. Before they start, the game randomly picks a symbol that expands during those rounds.
Buying free games for 100× the stake
Book of Ra deluxe Buy Bonus lets you buy free games for 100 times the total stake. The maker promises a spin with three scatters – a certain trigger, in other words, not a certain win. According to the page, the win cap for this version is 50,000× the stake.
Diamond Link and Cash Connection
Both are built on respins with fixed prizes. In Diamond Link, six or more diamonds trigger three spins, and every new diamond resets the counter to three; filling all 15 positions means the Grand. Cash Connection works in a similar way with coins on 15 separate reels (Lock & Spin). Mini, Minor, Major and Grand are fixed multiples, not a progressively growing sum – we explain the difference in the Hold & Win slots ranking.
A 100× bonus buy versus the 5 EUR cap per spin
Rule 2.7 of the Dukat.bet general bonus terms says that while a bonus is being wagered, a default maximum bet of 5 EUR applies – and a purchased bonus round counts towards it too. At a price of 100× the stake, that has a real practical effect.
Model calculation with invented amounts – not Dukat.bet data:
- Base stake of 1 EUR → buying the free games costs 100 EUR, twenty times the limit.
- Base stake of 0.05 EUR → the buy costs exactly 5 EUR, right on the line.
- Anything above 0.05 EUR would break the limit while a bonus is active.
So if you play with a bonus, Novomatic’s Buy Bonus versions are only realistically usable at the very lowest stakes.
The Dukat.bet slot offer and Novomatic games
If you play Novomatic titles with a deposit, the slot offer is called Slots Bonus – 500% up to 3,000 EUR + 15% Cashback. Slots count 100% towards wagering (point 2.14), and these are no exception.
Watch out for point 2.15, however. On top of a specific list of excluded games, it removes “all jackpot slots” from bonus wagering. With families such as Cash Connection, Starlight Jackpots or some Hold & Win titles, check whether a given game falls under that rule before you play it with a bonus. Point 2.9 sets a default lifetime of 14 days for a bonus.
With no demo and no public RTP, the sensible start is the in-game rules and a small stake. The steps to take before your first round are summed up in the pre-play checklist.