Greentube
Greentube — provider review
Book of Ra, Sizzling Hot and Lucky Lady’s Charm at online casinos are the work of Austria's Greentube, the digital division of NOVOMATIC. The Vienna-based company releases online versions of the group's legendary slot machines as well as its own new series. It is led by CEO Thomas Graf.
Besides supplying games to other casinos, the Greentube group runs its own real-money and social casinos: StarGames, GameTwist and Admiral. For operators, the company also offers technology solutions such as the Mynt platform and the Plurius server-based system.
💡 Greentube facts
- 1998 — the company's first game, Ski Challenge
- 2000 — the company takes the name Greentube
- Headquartered in Vienna, Austria
- Part of the NOVOMATIC group since 2010
- Slots, table games, video poker and video bingo
History
Greentube started out with a 3D sports game, and today it handles NOVOMATIC's entire digital business, from slots to its own casinos. This is our observation, not a statement from the company. We cover the group itself in a separate review of NOVOMATIC.
| Date | Event |
|---|---|
| 1998 | Dürrschmid & Reisinger OEG releases the 3D sports game Ski Challenge |
| 2000 | The company is renamed Greentube Internet Entertainment Solutions AG |
| 2010 | Greentube becomes part of the NOVOMATIC group |
| March 2021 | Dutch company Eurocoin Interactive, now Greentube Netherlands, joins the group |
| August 2022 | According to industry sources, the company receives approval in Ontario |
| January 2023 | Launch of the Mynt technology platform and acquisition of a controlling stake in Maltese company Alteatec |
| November 2024 | Launch with Hard Rock Digital in New Jersey |
| 27 November 2025 | Greentube games go live with bet365 in Spain |
| 5 May 2026 | A deal to acquire Czech operator Kingsbet CZ is announced; completion depends on regulatory approval |
| 20 July 2026 | Launch in Alberta |
| September 2026 | Release of Highway to Bell Stack & Collect |
Licences
Both licences listed on the company website are held by Greentube GmbH.
| Regulator | Document |
|---|---|
| UK Gambling Commission (UKGC) | Gambling software licence, account 41020 |
| Malta Gaming Authority (MGA) | MGA/CRP/120/2006, Type 1 Gaming Services (since 1 March 2023) |
In January 2025, the UKGC announced that Greentube Alderney Limited — the group's operator company that runs the Admiral Casino brand — would pay £1 million in a regulatory settlement for social responsibility and anti-money laundering failures. In 2021, the same company had already paid £685,000 over similar failures. The decision concerns the group's casino, not Greentube's games.
NOVOMATIC classics and new series
The best-known part of the catalogue is the online versions of classic NOVOMATIC slot machines: Book of Ra deluxe, Sizzling Hot deluxe, Lucky Lady’s Charm deluxe, Dolphin’s Pearl deluxe and Plenty on Twenty. Many players know them from land-based gaming halls.
At the same time, the studio is developing new series. The company website highlights Diamond Link, Win Ways and Diamond Mystery, and in 2026 Greentube names Piggy Prizes, Cash Connection and Starlight Jackpots as its main focus areas.
Greentube slots
These three games show how varied the studio's catalogue is, from simple fruit classics to a slot with 15 independent reels and jackpots.
| Slot | Grid and lines | Main feature | Max win |
|---|---|---|---|
| Book of Ra deluxe Buy Bonus | 5×3, number of lines not specified | 10 free games with an expanding symbol, bonus buy | Not specified |
| Piggy Prizes — Ghost of Gambini | 5×3 made of 15 independent reels, 40 lines | Lock & Spin and Super Lock & Spin with jackpots | Not specified |
| Sizzling Hot deluxe | Not specified, fixed lines | Star scatter | Not specified |
Book of Ra deluxe Buy Bonus is the famous “book” classic with the option to buy the bonus. The Book of Ra symbol substitutes for other symbols, and three or more books anywhere award 10 free games. During the free games, one symbol becomes special: it expands to cover the whole reel and pays in any position on a line. The bonus triggers on average once every 150–200 spins, and you can buy it for 100x your bet.
Piggy Prizes — Ghost of Gambini is a new release in the Piggy Prizes series. Its 5×3 grid is made up of 15 reels that spin independently, with 40 lines. Coins and jackpots on the grid are padlocked and unlocked by the Gambini or Ghost of Gambini symbol in the centre. The ghost adds and boosts coins and also “feeds” two piggy banks.
When a piggy bank bursts, the Lock & Spin bonus begins: frames appear on the grid and turn into cash or jackpots at the end. In the enhanced version, Super Lock & Spin, every frame becomes a jackpot.
Sizzling Hot deluxe is a no-frills fruit classic. Wins pay left to right on fixed lines, and the star scatter pays in any position.
Other games from the studio include Lucky Lady’s Charm deluxe, Cash Connection — Golden Sizzling Hot, Highway to Bell Stack & Collect, Piggy Prizes — Wish of Riches 2 and Rumble Riches — Haulin’ Gold.
Who Greentube suits
Why players love it
- Online versions of legendary NOVOMATIC slots: Book of Ra, Sizzling Hot, Lucky Lady’s Charm
- New jackpot series: Piggy Prizes, Cash Connection, Starlight Jackpots
- Besides slots — table games, video poker and video bingo
- UKGC and MGA licences
What to keep in mind
- RTP is not given in the game cards
- Some games are simple re-releases of classics with hardly any bonuses, such as Sizzling Hot deluxe
⚡ Verdict
Greentube will suit players who love gaming hall classics and want to play them online. For simple, no-frills play, choose Sizzling Hot deluxe; fans of “book” slots who don't want to wait for the bonus will like Book of Ra deluxe Buy Bonus; and lovers of jackpots and unusual features should try Piggy Prizes — Ghost of Gambini.
Where to play Greentube slots
You can explore the provider's games and choose a casino to play at in the slots and casinos sections on GamblingShot.
FAQ
1
When was Greentube founded?
The company has operated under the Greentube name since 2000, and its first game came out in 1998.
2
Does Greentube have a licence?
Yes. According to the website, Greentube GmbH holds a UKGC gambling software licence (account 41020) and MGA licence MGA/CRP/120/2006.
3
How many games does Greentube have?
According to partners, the studio has more than 400 games.
4
Are Greentube and NOVOMATIC the same company?
Greentube is NOVOMATIC's digital division: it releases online versions of the group's games as well as its own new titles. We cover NOVOMATIC in a separate review.
5
Does Greentube offer games other than slots?
Yes. The studio's catalogue includes table games, video poker and video bingo.
Where to play Greentube slots
Casinos from our catalogue that carry this provider’s games. Always check terms and bonuses on the casino page.
