Quick Stats
| Detail | Info |
|---|---|
| Provider | Eyecon Limited (Playtech group) |
| Game Type | Video Slot |
| RTP | 95.63% (Blackspins shows 96% — rounded; 95.63% is the certified independent figure) |
| Volatility | High |
| Reels / Rows | 5 × 4 |
| Paylines | 1–100 (variable, player-selectable) |
| Min Bet | $0.01 per spin (1 line at $0.01 per line) |
| Max Bet | $50.00 per spin (100 lines at $0.50 per line) |
| Max Win | 3,000x stake |
| Release | 2018 |
| Features | Heart Wild (reels 1, 3, 5 only; expands full reel; 3x prize multiplier), Lucky 7 Scatter (pays directly; triggers 15/20/25 free games), Free Games retrigger (up to 15×), Gamble Feature (up to 5× consecutive doublings) |
| Theme | Classic Fruit Machine / Romance |
| Platform | Desktop & Mobile (HTML5) |
What Is Heartburst?
Heartburst is Eyecon updating the classic fruit machine for the 5×4 era — same fruits, bells, bars, and sevens you’d recognise from a pub cabinet, but running on 100 paylines across a four-row grid with a wild that expands and triples simultaneously. The name captures it well: the Heart symbol is where the game’s personality lives. When it drops on reel 1, 3, or 5 and forms part of a winning combination, it first fills the entire reel with wild coverage, then triples every payline win it touches. A single Heart appearance can simultaneously affect multiple paylines on a 5×4 grid, and three Hearts — one on each of reels 1, 3, and 5 — means three fully-expanded wild reels feeding every payline with 3x multiplied wins across the board.
The Lucky 7 is the scatter and free games trigger — classic fruit machine iconography repurposed as the gateway to 15–25 free spins with the same expanding, tripling Heart wild remaining active throughout.
The fruit theme is deliberate and affectionate. Dove Casino’s review puts it well: Eyecon is taking you back to the pub cabinet era but with modern resolution, 100 paylines, and a bonus structure that the original machines never had. The funky synth soundtrack — unusual for Eyecon, who normally run quiet games — adds to the updated classic feel.
Who this is for: NZ players who enjoy classic fruit machine aesthetics with modern mechanics, want an expanding wild that genuinely compounds across a 100-payline grid, and are comfortable with high volatility in exchange for the 3,000x ceiling.
Who this is not for: Players who need 96%+ RTP. At 95.63%, the house edge is 4.37% — not dramatically above average, but meaningful over extended sessions. Players who want card-royal-heavy modern video slot aesthetics won’t find them here either.
RTP and Volatility
Heartburst carries an RTP of 95.63%, confirmed by SlotsTemple, JeffBet, and DoveCasino. The Blackspins header rounds this to 96% — use 95.63% when session planning. The house edge is 4.37%.
For context within the Eyecon catalogue at Blackspins: Haunted Hallows sits at 90.74%, Happy Birthday at 95.40%, and Heartburst at 95.63%. Heartburst is one of the stronger-performing Eyecon titles on the platform.
Volatility is high, confirmed by both Blackspins and SlotsTemple. On a 100-payline 5×4 grid, high volatility means the base game delivers frequent small wins across the wide payline coverage, punctuated by larger events when Heart wilds expand. The 3x multiplier on expanding wild wins is the mechanism that generates the session’s headline payouts — three simultaneous expanding Hearts is the scenario that approaches the 3,000x ceiling.
At $0.01 minimum (one payline at minimum bet), a $10 budget covers 1,000 spins. At $0.25 per spin (all 100 lines at $0.0025 each — minimum practical full-coverage stake), a $25 budget covers 100 spins with complete payline coverage.
Do this: Play with all 100 paylines active, even at minimum per-line stake. The Heart wild’s power is proportional to how many paylines it crosses when it expands — a single expanding Heart on reel 3 with 100 paylines active covers far more winning paths than the same wild on only 20 lines.
Betting Range
Heartburst uses a per-line bet structure: choose 1–100 active paylines and a bet per line of $0.01–$0.50. Total stake = active lines × bet per line.
The practical minimum for full 100-payline coverage is $0.01 per line × 100 = $1.00 per spin if each line costs at least $0.01. However, the Blackspins minimum is listed as $0.01 total (suggesting fractional per-line minimums are possible). Verify in-game what the per-line minimums are to confirm the true minimum total stake.
Maximum bet: 100 lines × $0.50 = $50.00 per spin. The Gamble Feature allows up to five consecutive doublings after any win — at maximum stake, a 3x Heart win followed by five successful gambles would produce a massive compounded outcome, though the 50/50 risk at each stage makes this a high-risk path.
Start here: Set all 100 paylines active at the minimum per-line bet for your first 20 spins. Watch which reels (1, 3, or 5) land the Heart wild most often. Heart wilds only appear on those three specific reels, so knowing which one fires first helps you mentally track your proximity to a three-reel expanding wild scenario.
How to Play Heartburst — Step by Step
Spins resolve quickly. Expanding Heart animations add a couple of seconds when triggered. Free games with multiple retriggers can run for several minutes.
- Set your paylines. Click the stacked coins icon (bottom-left panel) to choose 1–100 active paylines and your per-line bet ($0.01–$0.50). Total stake displays automatically.
- Open the paytable. Click the question mark icon (bottom-right panel) to review all symbol values, the Heart wild behaviour (expands, triples), and the Lucky 7 scatter pay table.
- Press spin. Left-to-right combinations on active paylines pay from reel 1. Classic fruit symbols and card royals make up the paytable; the Heart and Lucky 7 are the only special symbols.
- When a Heart wild lands on reel 1, 3, or 5: It expands automatically to fill all four row positions on that reel before wins are calculated. Every payline crossing that reel now has a wild in that position. Any winning combination that includes the expanded Heart wild has its prize tripled.
- Three Hearts (reels 1, 3, and 5 simultaneously): All three middle and outer reels filled with expanding wilds. Every one of the 100 active paylines runs through at least one expanded Heart — all wins on that spin are tripled. This is the scenario that produces the game’s largest base-game outcomes.
- Watch for Lucky 7 scatters. Three or more anywhere trigger free games. They also pay scatter wins multiplied by your total bet (3 = 5x total bet; 4 = 15x total bet; 5 = 300x total bet).
- During free games: Heart wilds remain active with the same expand-and-triple behaviour. Lucky 7s landing during free games retrigger the feature (up to 15 times total).
- After any win: The Gamble Feature activates — choose to double the win (50/50 guess, up to 5 consecutive attempts), or collect and continue.
Try this: When a single Heart expands on reel 3 (the central reel), count how many winning paylines it contributes to. On a 100-payline 5×4 grid, the central reel crosses the most paylines of any position — reel 3 expansion consistently produces the most widespread wild coverage per single Heart landing.
Symbols and Paytable
Heartburst uses a classic fruit machine symbol set with four card royals at the bottom, seven fruit/classic machine symbols in the middle, and the two special symbols.
Low-value card royals (J, Q, K, A): The standard paytable filler; need three or more on a payline for small wins.
Classic fruit machine symbols (ascending value): Lemon, cherry, orange, grapes, watermelon, bell, bar. The bar is typically the highest-paying regular symbol in classic Eyecon fruit machines. Exact credit values for each are in the in-game paytable — open via the question mark button.
Heart — Expanding Wild: Appears on reels 1, 3, and 5 only. On any landing, it expands to fill all four row positions on its reel before win calculation. Substitutes for all regular symbols. Triples every win it contributes to. Does not substitute for the Lucky 7 scatter.
This triple multiplier applies to the full payline win value, not just the position the Heart occupies. A bar combination with a Heart substituting on one position delivers 3× the standard bar combination payout.
Lucky 7 — Scatter: Pays directly on 3+ appearances anywhere regardless of payline. Pay schedule (× total bet): 3 = 5x; 4 = 15x; 5 = 300x. Triggers free games on 3+ landings. Only the highest scatter win counts per spin (added to line wins).
Watch for: The Lucky 7 scatter landing on reels 2 and 4 simultaneously. Because Hearts can’t appear on reels 2 and 4, a Lucky 7 on one of these inner reels combined with Hearts expanding on reels 1, 3, and 5 on the same spin would produce scatter wins, fully-expanded wild coverage, and 3x tripled line wins from the Hearts — the maximum single-spin combination the game can produce.
Bonus Features
Expanding Heart Wild with 3x Multiplier
Active in both base game and free games. The Heart appears only on reels 1, 3, and 5 — never on reels 2 or 4.
When a Heart lands on any of those three reels and forms part of a winning combination, the expansion and tripling sequence fires:
- The Heart expands to fill all four rows on its reel (before wins are evaluated)
- All payline wins running through the expanded Heart reel are assessed with the full four-row wild coverage
- Any payline win that includes the Heart substitution has its prize tripled (3x)
The expansion and tripling are automatically conditional on the Heart contributing to a win. If a Heart lands but doesn’t contribute to any winning combination, the expansion still occurs but the triple multiplier only applies where the Heart substitutes into a winning payline.
Eyecon’s official description confirms the sequence: “Heart symbols EXPAND to fill their reel before line wins are awarded. Prizes are TRIPLED when one or more Heart symbols substitute.”
Lucky 7 Free Games
Trigger: 3 or more Lucky 7 scatter symbols anywhere on the reels.
3 Lucky 7s = 15 free games. 4 = 20 free games. 5 = 25 free games.
During free games, the same paylines and bet per line from the triggering spin carry over. The Heart expanding wild remains fully active with its 3x tripling behaviour — free games are where the expanding Heart’s multiplier compounds most effectively.
The Lucky 7 scatter also pays directly: 3 scattered Lucky 7s = 5x your total bet; 4 = 15x; 5 = 300x (your total bet, not line bet — a significant distinction on a 100-payline game).
Retrigger: Landing 3+ Lucky 7s during free games adds another 15 free games. Retrigger cap is 15 times — theoretically yielding up to 375 free games beyond the initial trigger if all 15 retriggers produce five Lucky 7s each (though the initial award plus 15 retriggers at 15 spins each = 240 free games minimum for a fully-retriggered base).
Gamble Feature
Available after any win in the base game. Select correctly in a 50/50 guess to double the win. Up to 5 consecutive doublings are allowed — five successful guesses turn a base win into 32× that win amount. Wrong guess forfeits the winnings. Standard Eyecon mechanic; optional on every win.
Design and Theme
A dark purple background with clean, colourful fruit symbols on the 5×4 grid. The aesthetic sits somewhere between a vintage cabinet and a modern digital release — the fruits look genuinely juicy and well-rendered (watermelon, cherries, oranges all pop against the purple background), while the card royals maintain their classic proportions.
The funky synth soundtrack is an Eyecon departure — most of their titles run on spin sounds alone. It’s an upbeat, slightly retro electronic track that complements the classic-modern hybrid feel without overpowering the spin rhythm.
Heart animations when the wild expands are crisp and fast. The reel-filling expansion is a clear visual event without introducing lag, which matters on a 100-payline game where win calculations involve many simultaneous payline checks.
HTML5 — fully mobile compatible on iOS and Android. The 5×4 format scales to smartphone screens in landscape mode with the payline controls and bet selector accessible without scrolling.
Is Heartburst Worth Playing?
Pros:
- Expanding Heart wild on reels 1, 3, and 5 with automatic 3x tripling is a powerful, clean mechanic — three simultaneous expanding Hearts covers the entire grid with tripled wild coverage
- 100 variable paylines on a 5×4 grid gives maximum coverage breadth for wild expansions
- 3,000x maximum win is a credible ceiling for the expanding-and-tripling mechanic
- Free games retrigger up to 15 times — lengthy free games chains are achievable
- Lucky 7 scatter pays 300x total bet for 5 of a kind anywhere — meaningful direct scatter payouts at any stake
- Gamble Feature allows up to 5× consecutive doublings — useful for players who want to compound smaller wins
- RTP 95.63% — one of the stronger Eyecon titles at Blackspins; above Haunted Hallows (90.74%), Very Merry Christmas (95%), Happy Birthday (95.40%)
Cons:
- RTP 95.63% is below the 96% benchmark — the Blackspins header rounding to 96% creates a slight discrepancy players should be aware of
- Heart wilds restricted to reels 1, 3, 5 means reels 2 and 4 never deliver expanding wilds — those two reels only contribute regular symbol wins
- High volatility on a wide-payline game means base-game sessions can feel unremarkable between Heart wild events
- 3x tripling only applies when the Heart substitutes in a winning combination — a Heart that expands on a reel but doesn’t substitute (because the other reels already complete the combination without needing substitution) doesn’t triple that win
- Classic fruit theme is inherently less varied than modern slot aesthetics — the symbol set is the same across dozens of similar titles
Bottom line: Heartburst is a well-executed Eyecon fruit machine with a genuinely interesting expanding wild mechanic. The Heart’s automatic reel-expansion followed by prize-tripling turns what would be a standard wild substitution into a wide-coverage, multiplied event — and three simultaneous Hearts across reels 1, 3, and 5 is one of the cleaner high-impact scenarios in Eyecon’s catalogue. The 95.63% RTP is decent for a high-volatility classic-style title. Play all 100 paylines even at minimum stake, keep an eye on the three Heart-eligible reels, and let the expanding wilds do the work.
Responsible Gambling
Heartburst uses a certified random number generator (RNG). All reel outcomes, Heart wild positions, Lucky 7 scatter positions, free games triggers, and Gamble Feature outcomes are fully random and independent between spins. The 95.63% RTP applies across millions of spins — individual sessions will deviate. Set a session budget before playing, and contact your local responsible gambling support service if gambling causes concern.
Heartburst FAQs
What’s the RTP of Heartburst?
Heartburst has a return to player (RTP) rate of 95.63%, giving you decent value for your wagers over time.
Can I trigger more free spins after the feature starts?
Yes! The Free Games feature can be retriggered up to 15 times, which adds even more excitement to the game.
What does the Heart symbol do?
The Heart symbol in Heartburst substitutes for all other symbols except the scatter expands to cover reels, and triples payouts when it helps create a winning line.
Is Heartburst a high-volatility slot game?
Yes, Heartburst offers high volatility, which means less frequent wins but larger payouts when they happen.
