#AD | First Deposit Only | Min. deposit: £10, max. Bonus £50 | Game: Book of Dead | Spin Value: £0.1, Max Free Spins: 50 | WR of 10x Bonus amount and Free Spin winnings amount (only Slots count) within 30 days | Max bet is 10% (min £0.10) of the free spin winnings and bonus amount or £5 (lowest amount applies) | Spins must be used and/or Bonus must be claimed before using deposited funds. Bonuses do not prevent withdrawing deposit balance | T&C's apply | 18+ | BeGambleAware.org | Gambling is addictive, please gamble responsibly!
Double Bubble is the bubblegum fruit slot that began on Gamesys sites in 2006 and is now credited to Roxor Gaming: five reels, three rows and 20 paylines, a Bubble Line that pays with a multiplier and a pick-a-bubble bonus. 96.02% RTP and medium volatility. UnionSlots rating: 7/10. There is no demo on this page; UKGC-licensed casinos offer demo mode after registration and age verification (18+).
Where to Play Double Bubble at UK-Licensed Casinos
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Get 200 FS on Book of Dead with £20 Min Deposit
#AD | Automatically credited upon deposit. First Deposit Only | Min dep. £20. Game: Book of Dead | Spin Value: £0.1. Max Free Spins: 200. WR 10x free spin winnings amount (only Slots count) within 30 days | Max bet is 10% (min £0.10) of the free spin winnings amount or £5 (lowest amount applies) | T&C's apply | 18+ | BeGambleAware.org | Gambling is addictive, please gamble responsibly!
Get 100% up to £50 + 50 Free Spins on Book of Dead
#AD | First Deposit Only | Min. deposit: £10, max. Bonus £50 | Game: Book of Dead | Spin Value: £0.1, Max Free Spins: 50 | WR of 10x Bonus amount and Free Spin winnings amount (only Slots count) within 30 days | Max bet is 10% (min £0.10) of the free spin winnings and bonus amount or £5 (lowest amount applies) | Spins must be used and/or Bonus must be claimed before using deposited funds. Bonuses do not prevent withdrawing deposit balance | T&C's apply | 18+ | BeGambleAware.org | Gambling is addictive, please gamble responsibly!
Get 200% up to £50 + 20 Free Spins on Book of Dead
#AD | New Players Only. Wager from real balance first | 10X wager the bonus money within 30 days, and 10x wager any winnings from the free spins within 7 days | Contribution varies per game | Available on selected games only | Wager calculated on bonus bets only | Bonus offer and any winnings from the offer are valid for 30 days / Free spins and any winnings from the free spins are valid for 7 days from receipt | Max conversion: £50 the bonus amount or from free spins: £20 | Min Deposit £10 required | T&C's apply | 18+ | BeGambleAware.org | Gambling is addictive, please gamble responsibly!
#AD | New Players Only | Wager from real balance first. 10X wager the bonus money within 30 days and 10x wager any winnings from the free spins within 7 days | Contribution varies per game | Available on selected games only | Wager calculated on bonus bets only | Bonus offer and any winnings from the offer are valid for 30 days / Free spins and any winnings from the free spins are valid for 7 days from receipt | Max conversion: from the bonus amount: £50 or from free spins: £20. Min Deposit £20 required. Limited to 5 brands within the network | Withdrawal requests void all active/pending bonuses | Excluded Skrill and Neteller deposits | T&C's apply | 18+ | BeGambleAware.org | Gambling is addictive, please gamble responsibly!
#AD | New customers only. Opt-in required. Offer valid for 7 days from account registration Match Deposit Bonus Terms: 100% Match Bonus up to £100 on 1st deposit of £20+. 10x bonus wagering applies as do weighting requirements. Debit Card deposits only. Irregular gameplay may invalidate your bonus. Free Spin Terms: 100 Spins awarded on Big Bass Bonanza, valued at 10p per spin. | T&C's apply | 18+ | BeGambleAware.org | Gambling is addictive, please gamble responsibly!
#AD | New UK based customers only. You must opt in (on registration form) & deposit £10+ via a debit card to qualify. Offer valid 7 days from registration. Welcome Bonus: 100% match up to £100 on 1st deposit. 10x wagering applies (as do weighting requirements). Free Spins: Awarded on Gold Blitz once you have staked £10 on any game. Spin value = 10p. No wagering requirements on free spin winnings. | T&C's apply | 18+ | BeGambleAware.org | Gambling is addictive, please gamble responsibly!
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Features:Bubble Line Multiplier, Wild, Pick-a-Bubble Bonus
Double Bubble Review: Our Verdict
UnionSlots rating: 7/10. Double Bubble suits players who like simple, cheerful slots with a bit of history. The Bubble Line gives ordinary spins an extra chance to pay, and the bonus is quick and easy to follow. It is light on features by modern standards, though, and no reliable maximum win figure is published.
Pros
Bubble Line adds a second way to win on every spin
Quick pick-a-bubble bonus
96.02% RTP with medium volatility
Cons
Few features by modern standards
Dated design
No reliable maximum win figure published
Double Bubble Slot Facts
Provider
Roxor Gaming (originally Gamesys)
Release date
2006
RTP
96.02%
Volatility
Medium
Reels × rows
5 × 3
Paylines
20
Bonus
Pick-a-bubble, from three bonus symbols
Mobile
Yes, iOS and Android browser
How Double Bubble Works
Double Bubble pays on 20 lines with fruit-machine style symbols. The pink Double Bubble logo is the wild: it substitutes for all symbols except the bonus symbol and can link wins together. The game’s signature is the Bubble Line, explained below.
The Bubble Line
Symbols that land inside bubbles move down to a separate Bubble Line, which pays like a payline. Bubble Line wins are multiplied, and the multiplier is linked to your stake: the more lines or coins you play, the higher it goes.
Pick-a-Bubble Bonus
Three bonus symbols start the bonus. Bubbles float on screen, and you pop one to reveal a multiplier prize. It is a short feature rather than a long round, which suits the game’s quick, casual style.
3x-100x, 4x-500x, 5x-20000x
3x-50x, 4x-200x, 5x-500x
3x-25x, 4x-100x, 5x-500x
3x-25x, 4x-100x, 5x-500x
3x-20x, 4x-50x, 5x-500x
3x-10x, 4x-25x, 5x-500x
3x-5x, 4x-10x, 5x-200x
3x-5x, 4x-10x, 5x-200x
3x-2x, 4x-5x, 5x-100x
3x-2x, 4x-5x, 5x-100x
RTP, Volatility and What to Expect
The RTP is 96.02% and volatility is medium, so expect regular small wins with the Bubble Line helping between bonuses. The databases we checked give conflicting maximum win figures, so we do not quote one; check the paytable at your casino for the current prizes.
Double Bubble runs in the browser on iOS and Android. At UKGC-licensed casinos the stake is capped at £5 per spin (£2 if you are 18–24), and autoplay and turbo are switched off. Demo mode is available at most UKGC casinos after registration and age verification.
Gambling Responsibly
Slots should stay a paid-for form of entertainment. Set a budget before you play, and if gambling stops being fun, these UK services offer free, confidential help:
GamCare: National Gambling Helpline, 0808 8020 133, open 24/7.
GamStop: free self-exclusion from all UKGC-licensed gambling sites.
Molly Linwood
Content Specialist
I’m Molly Linwood, a Content Specialist at UnionSlots, where I’m dedicated to delivering the best online slot reviews and comprehensive industry insights for UK players. With a deep understanding of the latest trends in online gambling, I craft engaging, SEO-optimized content that helps UK players navigate the world of online slots. By staying up to date with the newest releases and slot mechanics, I ensure every piece of content adheres to UKGC and ASA guidelines. My work is driven by a passion for delivering valuable information about the best online slots in the UK, while keeping players informed about responsible gaming practices.
FAQ
What is the RTP of Double Bubble?
96.02%, with medium volatility.
Who makes Double Bubble?
It began on Gamesys sites in 2006. Databases now credit it to Roxor Gaming, which Aristocrat bought in 2023.
What is the Bubble Line?
Symbols in bubbles move to a separate line that pays with a multiplier linked to your stake.
How do you trigger the Double Bubble bonus?
Land three bonus symbols, then pop a bubble to reveal a multiplier prize.
How many paylines does Double Bubble have?
20 paylines on five reels and three rows.
Can I play Double Bubble on mobile?
Yes, in the browser on iOS and Android. UnionSlots does not host demos; UKGC-licensed casinos offer demo mode after registration and age verification.
