Last updated: May 2026. Mechanic explanation based on 300+ test spins plus Backseat Gaming's published rules pane.
The cannon-bomb is Pirate Bonanza's signature feature — the thing that makes it different from the dozens of scatter-pays cascade pokies that came before it (Sweet Bonanza, Sugar Rush, Sun of Egypt, etc.). It's a random-trigger detonation mechanic that fires a cannonball into the grid, blows up a chunk of symbols, and forces a fresh cascade. It's the closest thing in modern pokies to a "rescue mechanic" — and once you've played a few sessions, you'll start watching the cannon at the edge of the screen more than the symbols.
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What is the cannon-bomb?
The cannon-bomb is a random-trigger feature that activates on any base-game spin or free-spins spin. When it fires:
- The pirate cannon at the edge of the grid animates — smoke puffs, recoil, the captain ducks.
- A cannonball arcs into the playing field.
- It lands on a random position on the grid.
- A 4-7 position blast radius is detonated — symbols in the zone are removed.
- The reels above tumble down. Fresh symbols drop in.
- The cascade evaluation runs again — any new clusters of 8+ pay out.
The cannon-bomb is purely additive — it can't make a spin worse. At minimum it does nothing meaningful. At best it converts a dry spin into a multi-cascade win.
When does it fire?
The cannon-bomb is random, not player-triggered. You don't press a button to activate it. The trigger probability per spin is around 5-7% — meaning roughly 1 in 15-20 spins sees a cannon-bomb fire.
What we've observed (anecdotally, across 300+ test spins):
- The cannon fires more often after dry streaks. After 5-10 spins without a cluster hit, the perceived cannon-bomb rate increases.
- The cannon also fires during cascade chains — sometimes a base-game spin gets two cannon-bombs in the same spin.
- The cannon fires during free spins too — and there the feature is especially potent because cascades during free spins build the multiplier counter.
Whether the "fires more after dry streaks" pattern is real (a smoothing mechanic in the math) or just confirmation bias is hard to say without access to Backseat's source code. The studio hasn't published the trigger probability table.
What it does to the grid
When the cannon-bomb fires:
- Blast radius: Typically 4-7 positions in a roughly circular pattern around the landing point.
- Symbols removed: All symbols in the blast radius, low-pays and high-pays alike. Scatter coins are not removed (the cannon-bomb doesn't deactivate bonus triggers).
- Fresh cascade: Symbols above the blast tumble down, fresh symbols drop in from the top.
- New evaluation: The grid is re-checked for 8+ clusters of any symbol. If a new cluster forms, it pays out.
This is why the cannon-bomb is so good at rescuing dry spins. A spin where no cluster initially formed often has 4-5 of one symbol scattered across the grid. The cannon detonates a chunk, the cascade brings new symbols in, and that 4-5 cluster suddenly becomes 8+ because the new drops happened to add matching symbols.
Does the cannon-bomb stack or repeat?
Yes — within a single spin, the cannon-bomb can fire multiple times. You'll occasionally see two cannons fire in one spin, particularly if the first cannon-bomb triggers a long cascade chain that itself runs out without a hit. The second cannon-bomb then comes in for another rescue attempt.
Maximum cannon-bombs per spin: theoretically uncapped, but practically rare to see more than 2-3 in a single spin.
Cannon-bomb during free spins
The cannon-bomb's interaction with free spins is where it earns its money. Every cascade during free spins adds to the multiplier counter — and a cannon-bomb that triggers a multi-cascade event can add 3-5 to the counter in a single spin.
Practical example:
- You're in free spin 4 of 10.
- Multiplier counter at ×8.
- The spin starts dry. No clusters.
- Cannon-bomb fires, detonates 6 symbols, fresh cascade drops in.
- New cluster forms, pays out, counter ticks to ×9.
- That cascade triggers another cascade, counter to ×10.
- Spin ends at ×11 counter, with a small payout.
Without the cannon-bomb, that spin would've contributed nothing to the round. With it, you climbed by 3 multiplier ticks. This is the cumulative engine of the 15,000× max.
Hit-frequency impact
Backseat lists Pirate Bonanza's hit frequency at around 27% — roughly 1 in 4 spins lands at least one cluster. That number includes cannon-bomb-rescued spins.
If you mentally subtract the cannon-bomb contributions:
- Base scatter-pays hit rate: ~22% (without cannon-bomb rescues).
- Cannon-bomb rescue rate on dry spins: ~25% (roughly 1 in 4 cannon-bombs converts a dry spin to a hit).
- Combined hit frequency: ~27%.
The cannon-bomb adds roughly 5 percentage points of hit frequency. In a game with 1,000 spins per long session, that's 50 extra winning spins vs the same game without the mechanic.
Cannon-bomb vs. comparable mechanics in other pokies
| Pokie | Comparable mechanic | Frequency |
|---|---|---|
| Pirate Bonanza | Cannon-bomb (detonate) | ~5-7% of spins |
| Sweet Bonanza | None | N/A |
| Sugar Rush | Sticky multipliers (different mechanic) | Activated during cascades |
| Gates of Olympus | Random multipliers | ~6-8% of spins |
| Hand of Anubis (Hacksaw) | None | N/A |
| Razor Shark | Nudge feature | Random |
| Money Train series | Persistent bonus values | In bonus only |
Closest cousin is Gates of Olympus's random multiplier — both are random-trigger mid-spin features that "rescue" otherwise-dry spins. Olympus adds value via a multiplier ball; Pirate Bonanza adds value via a detonation that creates a new cascade.
Subjectively: the cannon-bomb feels more impactful. A multiplier ball lands and you might still get nothing. A cannon-bomb detonates and forces a re-roll — there's always a chance for something to come from it.
Can I trigger the cannon-bomb deliberately?
No. The cannon-bomb fires on RNG. No button, no bet pattern, no spin timing affects it. Some players claim "pressing spin slowly" or "spinning at exact intervals" affects the cannon — this is superstition, not math. The trigger probability is independent of player input.
The closest thing to "increasing" your cannon-bomb count is simply playing more spins. More spins = more total cannon-bombs. Per-spin rate stays the same.
Cannon-bomb mythology in the player community
The cannon-bomb has spawned a few player-community theories over the past year:
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"It fires more often at certain casinos." Unverified. The RNG is server-side at Backseat; casinos can't influence the cannon-bomb rate. If you feel a casino fires it less, it's likely sampling bias from short play sessions.
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"It fires during bonus rounds more than base game." Partly true — anecdotally, players report a higher feel during free spins. We can't verify whether the math actually weights it differently or whether the feeling is just because every cannon during free spins feels bigger (because of the multiplier counter).
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"You can 'force' a cannon-bomb by chaining cascades." False. Cannon-bomb trigger is independent of cascade activity. It's RNG only.
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"The cannon-bomb is broken on certain casino versions." Generally false. If the cannon is dramatically less frequent at a casino, you're probably on the reduced 94.26% RTP variant — but the variant itself doesn't change the cannon trigger probability, only the underlying payout math. Check the in-game info panel.
What this means for your sessions
A few practical takeaways:
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Don't tune your bet size around the cannon-bomb. It's free value, factored into the headline RTP. You can't strategy around it.
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Expect more cascades than visible scatter-pays would suggest. The cannon-bomb's contribution makes the hit frequency feel generous.
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The cannon-bomb is most valuable in free spins. Time you spend in the base game is mostly waiting for the bonus; the cannon-bomb makes that waiting marginally less painful.
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Don't celebrate every cannon-bomb. Most fire and produce small or zero wins. Only the ones that build into multi-cascade chains are notable.
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The cannon-bomb is part of why Pirate Bonanza is fun. It interrupts the "spin and wait" loop with a moment of visual drama every 15-20 spins. That's a deliberate design choice and it works.
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Quick FAQ
Is the cannon-bomb the same in demo and real money? Yes — same RNG, same trigger probability. Demo is the cheapest way to see it fire repeatedly.
Does the cannon-bomb work in Bonus Buy rounds? Yes — both during the base game phase and during the purchased free spins.
Can the cannon-bomb hit the scatter coins? No — scatter coins are exempt from the blast.
Does the cannon-bomb rate change between RTP variants? No — only the underlying payout math changes between the 96.31% and 94.26% variants. Cannon-bomb trigger rate is the same.
What's the maximum win from a single cannon-bomb? Theoretically unlimited within the game's per-round cap — but in practice the cannon-bomb produces small-to-medium wins (2-50× typically) when it converts a dry spin.
Do other Backseat Gaming titles have the cannon-bomb? No — it's specific to Pirate Bonanza and Pirate Bonanza 2 (the sequel uses a modified version).
About this mechanic guide
Cannon-bomb behaviour observed across 300+ test spins on all four featured casinos in April-May 2026. Trigger frequency estimated from session logs. Behaviour cross-checked against Backseat Gaming's in-game rules pane.
Gambling responsibly. The cannon-bomb is a fun feature — it's also a hook that makes the next spin tempting. Stay aware of how many "just one more cannon" spins you've taken. AU support: gamblinghelponline.org.au · BetStop · 18+ only.
Further Reading
Related reading in this guide:
- Pirate Bonanza Australia: The Full Pokie Review
- Best Australia Pokie Casinos to Play Pirate Bonanza
- Pirate Bonanza Max Win — How the 15,000× Ceiling Is Reached
- Scatter-Pays Explained — How Pirate Bonanza's 8+ Anywhere System Works
- PayID & Banking for Pirate Bonanza AU Players
- Pirate Bonanza on Mobile — iPhone, Android, AU Casino Apps