Double Bubble is an established UK online gaming platform and proprietary slot franchise run by Gamesys Operations Limited (UK Gambling Commission account 38905, Gibraltar licence no. 46). The platform works on a bingo-first hybrid model, offering over 400 online slot games alongside 75-ball, 80-ball and 90-ball bingo rooms, live casino tables and exclusive branded titles. The "400+" figure reflects the operator's own mobile-app catalogue claim; third-party review data counts 500+ titles once Slingo, instant-win and table verticals are included. In other words, the total you see in the lobby depends on how categories are bundled and on the date of the audit. Readers comparing wider online casino platforms will recognise this counting gap as an industry-wide reporting artefact rather than a contradiction.
How to read the RTP figures below. One title can ship in several builds, and the number in the lobby is set by the operator, not the studio. Our rule is simple: treat any published RTP as a long-run average across millions of spins, never as a forecast for your session, and confirm the figure in the in-game paytable before the first real-money spin. That habit costs ten seconds and settles most arguments.
Franchise provenance. The Double Bubble slot series was historically built by Roxor Gaming, which released the original title in August 2008. Roxor Gaming was acquired by Aristocrat Interactive in 2023, and from 2024 Aristocrat consolidated its development arm into a single brand, still supplying exclusive software to platforms operating under Bally's and Gamesys Operations Limited. The Double Bubble trade mark itself remains registered to Roxor Gaming Limited, which is why operator footers cite both entities.
Unlike white-label casino sites that lean purely on shared software feeds, Double Bubble pairs third-party games from studios such as NetEnt, Pragmatic Play and Blueprint Gaming with its own in-house slot universe built around the bubble mechanic. Sitting beside them are the usual British lobby staples, Rainbow Riches among them, which makes the proprietary titles easier to benchmark. That mix matters commercially, because the UK online slot vertical has expanded sharply: