Greentube Sister Sites
Greentube has one confirmed UK casino brand: Admiral Casino. Greentube Alderney Limited operates the live admiralcasino.co.uk domain under active UK Gambling Commission account 39050. Greentube GmbH, NOVOMATIC and overseas brands such as StarGames are related businesses or products, but they are not additional UK sister casinos on this account.
Greentube Sister Sites at a Glance
Written by Alex MorrisReview updated – 14 July 2026
The short answer is unusually clear: Admiral Casino is the only true UK sister brand to show. This is more useful than padding the list with casinos that merely carry Greentube or NOVOMATIC games, because game suppliers serve many unrelated operators.
| Sister site | Operator / relationship | Licence / status | Best for | Main risk | Verdict |
|---|---|---|---|---|---|
 Admiral Casino |
Greentube Alderney Limited; only UK consumer brand on the account | UKGC 39050; Active | NOVOMATIC and Greentube slots with a recognisable UK venue brand | No second true sister to compare; two recent compliance settlements | The only genuine UK Greentube sister site |
Admiral Casino: The Only Confirmed UK Sister
Admiral Casino is the consumer-facing brand for Greentube Alderney Limited’s UK operation. The lobby leans heavily on Greentube and NOVOMATIC titles, including familiar Book of Ra and Lucky Lady’s Charm games, but it also carries slots, live casino, bingo, Slingo and tables from external providers such as Pragmatic Play, NetEnt, Blueprint Gaming, Gaming Realms and Evolution.
The current new-player offer is 100 free spins after a first deposit of at least £10: 50 spins on Admiral Feel the Flutter and 50 on Sizzling Hot Deluxe. Winnings have 1x wagering, game contributions vary, active rewards expire after three days, and PayPal or Paysafe deposits do not qualify. Those restrictions matter more than the headline number.
- Best reason to choose it: direct access to Greentube and NOVOMATIC favourites alongside a broader casino lobby.
- Payment checks: the site lists cards, PayPal, Apple Pay, Skrill, Neteller and Paysafecard. Confirm which method supports withdrawals before depositing.
- Verification: age, identity and source-of-funds checks can apply. Complete requested checks promptly and use payment details in your own name.
- My verdict: Admiral is a credible choice for players who specifically want the Greentube catalogue, but it is not a network-hopping opportunity because there is no second UK sister brand.
Greentube, NOVOMATIC and StarGames Explained
Greentube Alderney Limited is the consumer-facing licensee behind Admiral Casino in Great Britain. Greentube GmbH is the wider digital gaming and software business, which holds a separate UK gambling-software account, 41020. NOVOMATIC is the parent group. These relationships explain why Admiral carries so many Greentube and NOVOMATIC games, but they do not create extra UK sister-site accounts.
StarGames is a Greentube consumer brand in other regulated European markets, and Greentube supplies games to many unrelated casinos. Neither fact makes StarGames or every Greentube customer a UK sister site of Admiral Casino. For this search, the operator’s current UKGC trading names and domains are the decisive evidence.
Licence Status and Regulatory Record
UKGC account 39050 is active and covers remote casino, bingo, gambling software and betting activities. The register currently gives one active trading name, admiralcasino, and one live consumer domain, admiralcasino.co.uk. That makes the sister-site answer narrower than many comparison pages suggest.
Greentube Alderney Limited has also faced two UKGC enforcement cases. It paid £685,000 in 2021 and made a £1 million regulatory-settlement payment in 2025 after failings in anti-money-laundering and social-responsibility controls. The 2025 findings concerned controls used between September 2022 and June 2023. They did not allege rigged games, but repeated compliance failings are relevant when judging the operator, particularly around affordability, customer interaction and source-of-funds handling.
Greentube FAQs
What are Greentube’s sister sites?
Admiral Casino is the only confirmed UK consumer casino operated by Greentube Alderney Limited. The current UKGC account lists admiralcasino as its sole active trading name and admiralcasino.co.uk as its consumer domain.
Does Admiral Casino have any true UK sister sites?
No additional consumer casino domains are currently listed on Greentube Alderney Limited’s UKGC account 39050. Other casinos may use Greentube games, but a software-supply relationship does not make them sister sites.
Who owns Greentube?
Greentube is NOVOMATIC’s digital gaming and entertainment division. Greentube Alderney Limited is the licensed business that operates Admiral Casino for Great Britain.
Does Greentube hold a UK Gambling Commission licence?
Yes. Greentube Alderney Limited holds active UKGC account 39050 for remote casino, bingo, gambling software and betting activities. Greentube GmbH has a separate software account, 41020.
Has Greentube been subject to UKGC enforcement action?
Yes. Greentube Alderney Limited paid £685,000 in 2021 and £1 million in 2025 after findings involving anti-money-laundering and social-responsibility controls. The 2025 action covered failings between September 2022 and June 2023.
What is Admiral Casino’s current welcome offer?
The current offer is 100 free spins after a qualifying first deposit of at least £10: 50 on Admiral Feel the Flutter and 50 on Sizzling Hot Deluxe. Spin winnings have 1x wagering, game contributions vary, and active rewards expire after three days.