IGT/GTECH • Advantage Play Reference
Look at the bottom of the screen for bubble tops peeking up below the reels.
More bubbles visible = More value left by the previous player
Bubbles that will rise to Logo symbol positions are especially valuable (triggers expansion)
Check all five reels — bubbles can be waiting below any of them
No bubbles visible? Walk away — no advantage exists
Unlike most slots, wild bubbles persist between players. They bubble up from below the screen after each spin.
When a previous player leaves with bubbles still rising, you inherit those wilds for free — they didn't pay for them, but you benefit.
Each spin, bubbles move up one row. Bubbles on the top row float off. Your goal: capture value before it disappears.
4 rows × 5 reels
One payline per credit bet
Two modes: Wild Bubble and Bubble Burst
No wilds on reel strips — bubbles randomly appear from bottom after each bet
Wilds substitute for any symbol except scatter
If bubble replaces scatter, you get credit for both
Each spin: bubbles move up one row
Top row bubbles float off next spin
💡 Key: You can see bubble tops below bottom row — this is your edge!
Bubble lands on Logo symbol → expands to all adjacent positions (8 wilds max)
Edge: 5 wilds • Corner: 3 wilds
Expanded wilds do NOT bubble up — only original bubble mechanics apply
Expansion on scatter = counts as both wild AND scatter
3+ Treasure Chests trigger bonus
Stage 1: Pick bubbles → reveal 1-5 free games or 2-3 extra picks
Picks: 3 scatters = 5 • 4 scatters = 10 • 5 scatters = 20
Stage 2: Free spins on separate bonus reel strips
Can re-trigger • Max: 150 free games
Activated by doubling your bet
Half the bet = non-refundable fee
Wins based on half the bet with lower pay table
Randomly places extra bubbles ("exploding wild")
Burst bubbles also bubble up each spin
⚡ Industry Standard: Paid features typically have higher overall return when activated