Winni the Witch rules the cemetery reels. She expands to cover entire reels and triples every win she’s part of. Land three cauldrons to unlock one of three spooky free spin features — your choice. Medium volatility, 50 paylines, zero need for broomstick lessons.
Winni’s World — Why Bubble Bubble Is a Fan Favourite
Bubble Bubble is RTG’s iconic Halloween-themed slot, set in a moonlit cemetery where Winni the Witch rules the reels. Released in 2015, it became an instant player favourite for its triple-choice bonus system — you pick one of three cauldrons to reveal which of three unique free spin features you get.
With 50 paylines, Winni’s expanding wild covers the entire centre reel and triples any win she’s part of. Medium volatility means balanced sessions — wins come regularly, and the bonus triggers at a healthy frequency.
From Winni the Witch to the creepy crawlies — who pays what.
🧙♀️ Wild
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Winni the Witch — Expanding Wild
The star of the show. Appears only on reel 3 during the base game — but expands to cover the entire reel whenever she can complete a win. Every win she’s part of is tripled (3×). During Wild Witches free spins she can spread to multiple reels simultaneously.
WILD EXPANDING 3× MULTIPLIER
🎯 Scatter
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Bubbling Cauldron — Scatter
The bonus key. Land 3 or more Cauldrons anywhere on the reels to trigger one of three free spin features. Click any cauldron to reveal which bonus you’ve unlocked. Scatter wins are added to line wins. Can appear on all 5 reels.
SCATTER BONUS TRIGGER RETRIGGER
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Black Cat
Top-paying symbol besides Winni. For 5-of-a-kind with Winni Wild tripling the win, the Black Cat becomes the route to 3,000× best-case scenarios.
TOP PREMIUM
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Crow / Raven
High-value bird symbol. Pairs frequently with the expanding Winni on reel 3 for tripled wins. Appears on all 5 reels.
HIGH PREMIUM
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Pumpkin / Frog / Spider
Mid-value symbols — the Halloween trio. Appear on all reels. On a 50-payline grid these mid symbols hit frequently, keeping the session alive between bigger feature hits.
MID SYMBOLS
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Skulls, Spiders & Crystal Balls
Lower-value symbols. Still meaningful with Winni expanding across reel 3 tripling wins. The 50-payline structure means even these symbols win frequently.
LOW SYMBOLS
🎁 Three Bonus Features
Pick a Cauldron — Three Spells Await
Land 3+ Cauldrons, then click to reveal which of three unique free spin bonuses Winni conjures for you.
🧙♀️ Wild Witches
Most powerful feature
9
Free Spins
3×
Wild Mult.
∞
Retrigger
The premium bonus. Winni appears on reel 3 as normal — but each time she shows up, she casts a spell turning 1–2 additional reels completely wild. Up to 3 reels can go fully wild on the same spin, creating enormous payouts. Win-Win guarantee: if total wins are under 10× stake, you receive 100× instead.
⭐ Best Pick For: Maximum win potential. When Winni spreads to 3 reels, the entire 50-payline grid is effectively covered — huge wins on every spin.
The longest free spin round. You receive 20 free games, and on each spin 1–9 Wild Ghost symbols are randomly added to the reels. Each ghost substitutes for any symbol. With up to 9 ghosts per spin on a 50-payline grid, entire screens of matching symbols are possible.
⭐ Best Pick For: Volume of play. 20 spins is the longest bonus, and retriggers add 20 more. Lower individual win peaks than Wild Witches, but more total spins.
Fewest spins — but the most consistent. Winni covers the entire centre reel (reel 3) for all 7 spins, tripling every win. With a fully-wild reel 3 for every spin, 50 paylines deliver consistent 3× wins every single round. Highly reliable with strong retrigger potential from cauldrons on reels 1 and 2.
⭐ Best Pick For: Consistency. Guaranteed 3× on every spin of the feature — the most predictable and often the highest-returning per-spin bonus in the game.
50 paylines are always active — all bets apply across all 50. The $0.50 minimum covers all paylines at $0.01 each. Use Autoplay for hands-free sessions. Medium volatility suits mid-range bets perfectly.
2
Winni Expands on Reel 3 — Base Game Wins
In the base game, Winni only appears on reel 3. When she can complete any win, she expands to cover the entire reel and that win is tripled (3×). With 50 paylines and a full reel 3 wild, expect multiple simultaneous winning lines.
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3 Cauldrons = Bonus Triggered
The Cauldron Scatter can appear anywhere on all 5 reels. Land 3 or more to enter the pick screen — click a cauldron to reveal Wild Witches, Great Ghosts or Bewitched. Your choice is random from the cauldrons, so every bonus has equal probability.
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Retrigger with 2+ Cauldrons During Bonus
All three bonus features can retrigger during free spins. Landing 2+ Cauldrons (or sometimes Winni + Cauldrons depending on the feature) awards additional free spins in the same mode. Chain retriggers build massive spin counts.
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Win-Win Guarantee in Wild Witches
During the Wild Witches feature: if your total free spin winnings are less than 10× your triggering bet, a Win-Win bonus is awarded — instantly adding 100× your bet as a consolation prize. A safety net for lower-variance bonus sessions.
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Mobile-Ready — All Devices
Bubble Bubble plays instantly in your iOS or Android browser. No download, no app. Full 50-payline layout, all three bonus features and the expanding Winni wild work perfectly on any screen size.
More paylines means more winning combinations per spin. At 50 lines, even a medium-value symbol on 3+ reels pays across multiple lines simultaneously. The expanding Winni covers all 50 lines when she appears on reel 3.
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Never Skip the 3× Triple
The base game Winni expansion is underrated. A full reel 3 wild tripling payouts across 50 paylines produces surprisingly large base-game wins — especially when Black Cat or Crow appears on reels 1, 2, 4 and 5 simultaneously.
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Chase the Retrigger Chain
The biggest Bubble Bubble sessions come from retrigger chains — especially in Great Ghosts where 20 spins + 20 more retrigger = 40 spins with up to 9 ghost wilds per spin. Patient play at moderate bets maximises retrigger probability.
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