Greentube casino games

What Greentube casino games are

Greentube is the internet arm of the Austrian Novomatic Group. Its roots go back to 1998, it took the Greentube name in 2000, and it joined Novomatic in 2010. The company is headquartered in Vienna and has a British office in Nottingham. Its job is to take games built for Novomatic’s cabinets in arcades and casinos and supply them to online operators, alongside games designed for the web from the start.

That heritage explains the look. Book of Ra Deluxe, Dolphin’s Pearl Deluxe and Lord of the Ocean are 5×3, 10-line games with simple symbols and a single free spins feature, closer to a classic slot than to the busy grids of newer studios. Greentube’s catalogue also includes video bingo, video poker, table games and a social casino (free-to-play) business. For the parent company’s land-based story, see our Novomatic profile; the providers hub lists the rest.

Greentube and Novomatic: how the two names fit together

In UK lobbies you will see some of these games filed under Novomatic and others under Greentube, sometimes on the same site. Both are correct: Novomatic created many of the original designs, and Greentube adapts and supplies them online. When the game’s splash screen or help page names Greentube, that is the supplier responsible for the online version.

Greentube’s UK licence and the Admiral Casino settlement

The Gambling Commission’s register lists Greentube GmbH, with a Vienna head office, under account number 41020. It holds one active remote licence, for gambling software, running since 16 March 2015. That is the licence that allows it to supply games to British casinos. You can look it up on the Commission’s public register of businesses (opens in a new tab) by name or number.

A different company in the same group, Greentube Alderney Limited, ran the consumer site Admiral Casino. On 9 January 2025 it agreed to pay £1 million after the Commission found social responsibility and anti-money laundering failures, its second regulatory action after a £685,000 payment in 2021. The Commission’s statement on the Greentube Alderney settlement (opens in a new tab) sets out the failings, which concerned checks on customers rather than the fairness of games. Our page on Gambling Commission fines explains how such settlements work.

A supplier’s licence and a casino’s licence are separate things. Even when a game comes from a licensed supplier, check the casino itself on the register using our licence-checking guide.

The Book of Ra formula: expanding symbols explained

Book of Ra Deluxe gave its name to a whole genre of ‘book’ slots. The book symbol is both wild and scatter: three or more anywhere start ten free spins. Before they begin, one ordinary symbol is picked at random to become the special symbol for the round.

During free spins, whenever enough of the special symbol land to make a win, it expands to fill each reel it appears on and pays across all ten lines, even when the reels are not next to each other. That is the only way the game produces its larger results, and why the volatility is published as very high. The idea is the same as an expanding wild, applied to a regular symbol.

A worked example

Stake £1 across 10 lines (10p per line). In free spins the explorer is chosen as the special symbol and lands on reels 1, 3 and 4. It expands to cover all three reels and pays the three-of-a-kind amount on every line, ten times over, rather than once. If only two land and the symbol needs three to pay, nothing expands. Most free spin rounds end with modest totals; the large ones need the special symbol on four or five reels.

Greentube casino games compared: RTP and volatility

Sizzling Hot Deluxe is the purest fruit-machine design in the list: five lines, fruit symbols, no free spins and a published 5,000x max win. If you grew up with pub machines, the feel is familiar; our fruit machines page covers that family of games.

Why Greentube RTPs sit lower, and what the gap costs

The Deluxe classics were designed when a return in the mid-90s was normal on casino floors, and the online versions keep figures close to that. Compared with a modern slot at 96.5%, a 95.1% game keeps about £1.40 more per £100 staked on average. Over a short session that is easily hidden by volatility, but it adds up with regular play.

None of these is a prediction of a single session; they are long-run averages. Use them to compare games, not to estimate what you will win. Our RTP explainer and the house edge guide explain why the casino’s margin applies to every spin.

Diamond Link and Greentube’s jackpot features

Greentube’s newer series move away from the book formula. Diamond Link games use a hold-and-respin feature: landing enough special symbols locks them in place and awards a set of respins, with each new special symbol resetting the count. Values on the locked symbols are added up at the end, and some games award fixed jackpot prizes on top. Our guide to hold and win features explains the maths of the respin count.

Fixed jackpots are set multiples of the stake rather than a growing pool, which makes them easier to understand than a network progressive. The fixed jackpot glossary entry covers the difference. Exact prize levels and RTPs vary by title, so read each game’s help screen.

Video bingo, video poker and table games from Greentube

Greentube’s product list goes beyond slots. Video bingo is a single-player, ball-draw game with a paytable for patterns, quite unlike the community 90-ball games described in our online bingo guide. Its video poker titles use the draw-poker format explained on our video poker page, where the paytable decides the return.

Non-slot RNG games such as video poker and table games have had to meet design rules since 17 January 2025, including a minimum game cycle of 5 seconds and no autoplay, so they move more slowly than they did before. Our table game speed rules page has the detail.

UK rules on Greentube casino games in 2026

• Slots must take at least 2.5 seconds per spin, with no turbo or slam-stop, under the Commission’s game design changes (opens in a new tab) from 31 October 2021.
• There is no autoplay on UK versions, which matters for classic games that once relied on it.
• The maximum stake is £5 per spin for players aged 25 and over, and £2 for those aged 18 to 24 (stake limit rules).
• Results equal to or below your stake must not be celebrated as wins.
• Demo play is available only after age verification (since May 2019).

Some classic games include a gamble feature that lets you risk a win on a card guess. Where a UK version offers one, it is optional; it does not improve the game’s overall return and can lose the whole win in one click, so many players simply collect.

How to find Greentube games in a UK casino lobby

1. Open the slots lobby and look for a provider filter.
2. Try both Greentube and Novomatic, because sites file the same games under either name.
3. Search for Book of Ra or Lucky Lady if neither name appears in the filter.
4. Open the game’s paytable and confirm the RTP version, as Book of Ra Deluxe has more than one.
5. Check the stake per spin, remembering that the 10-line games divide it across lines.
6. Set a deposit limit before you start; the safer gambling menu in your account has the tools.

Where to play classic slots like Greentube’s with an offer

Our partners are five UKGC-licensed casinos, and the offers below were last checked on 5 October 2026. They are slot welcome offers on selected games, not Greentube promotions, so check the eligible game list in each set of terms.

• Coral: 18+. New players placing £10 of slot bets after a deposit between 1 October 2026 and 1 February 2027 get 100 free spins at 10p each on selected games. Accept within 48 hours, use within 7 days; spin winnings carry no wagering. Payments by Neteller, PayPal, Paysafe, Skrill, prepaid cards and some debit cards are excluded.
• Ladbrokes: 18+. After spending £10 on slots, new customers receive 50 free spins daily for 10 days (500 maximum) at 10p each on selected games; claim by 23:59 each day, use within 7 days, no wagering. Prepaid cards, PayPal, Paysafe, Neteller, Skrill and Moneybookers deposits are excluded.
• PlayOJO: 18+. New UK customers outside Northern Ireland get 80 free spins on Big Bass Bonanza at 10p with a first deposit of at least £10; no wagering, and winnings are paid as cash. Only through the designated link, and not combinable with other offers.

Coral and Ladbrokes have the same operator, LC International Limited, which can limit holding new accounts at both. Treat any spins as entertainment rather than income; free, confidential support is available from GamCare (opens in a new tab) and the National Gambling Helpline on 0808 8020 133.

18+. Gambling should be entertainment that costs money, not a way to make it. Set a deposit limit before you play: how to set deposit limits. Free, confidential help: National Gambling Helpline 0808 8020 133.