Play Demo
75x your stake buys the feature in Diamond Explosion 777. In our session, that investment returned 180x, and not from a single lucky hit. The free games round triggered multiple Explosion sequences where diamond symbols locked onto the reels, merged into clusters, and combined into prize shapes worth up to 225x per formation. RubyPlay has built a three-layer feature system into this 50-payline slot. Token triggers in regular play feed into Free Games with a random wild reel, which feed into Explosion rounds where every locked diamond shapes the next spin. The depth here is genuine.
Three colour-coded 777 symbols appear exclusively during regular play, each linked to a different feature. The red and gold Token may randomly launch Explosion Free Games. The green TOKEN may trigger the Jackpot Pick. The purple Token may activate Free Games. These symbols carry no payout value of their own — they exist purely as feature keys, and their random activation means any spin outside the bonus rounds has three separate paths into the feature set.
Land three or more horseshoe Scatter symbols, or get lucky with the purple Token, and the game awards 10 Free Games. Scatter payouts accompany the trigger: three symbols pay 2x your total bet, four pay 5x, and five pay 20x. During Free Games, one reel is randomly selected each spin to fill entirely with symbols that function as both wilds and prize diamonds. This dual-role reel is the engine of the bonus. Collecting six or more diamond prize symbols across Free Games activates the Explosion round, pulling you deeper into the game’s layered feature set.
Seven Explosion Free Games begin when the diamond threshold is reached. Every prize symbol that triggered the round locks in position, and the remaining reel spots split into individual spinning positions. Adjacent locked diamonds combine horizontally or vertically into shapes, and bigger shapes mean bigger rewards. A single 1×1 diamond pays 2x your bet. A 2×3 block pays between 10x and 35x. The maximum 5×3 formation can award 100x to 225x your bet, or the Major or Grand jackpot. Each spin adds more diamonds, and existing clusters can grow as new positions lock, building the total prize with every spin until no Explosion Free Games remain or the entire grid fills.
The Jackpot Pick feature triggers randomly through the green token during regular play or through any wild symbol during Free Games. The game presents a pick-and-reveal board with four tiers. Pick symbols until three of the same jackpot level match, and that prize is awarded. At a €1.00 stake, the tiers run Mini (€10), Minor (€15), Major (€50), and Grand (€800). Multipliers of 2x, 3x, 5x, or 10x can appear alongside each pick, amplifying the final payout if the matched tier carries one.
For 75x the current total bet, the Buy Feature bypasses regular play and launches directly into Free Games. The triggering spin can award additional wins before the free round begins. The Buy Feature operates at a theoretical return of 96.34%, marginally above the standard 96.32% RTP. It may not be available at every bet level.
Every spin in Diamond Explosion 777 carries a quiet secondary function. The three token symbols (red, green, and purple 777s) sit alongside the standard paytable and can randomly activate features at any moment. Regular play isn’t just about landing paying combinations. It’s also a constant low-level lottery across three feature paths. Bets range from €0.50 to €30.00 across 50 fixed paylines on a 5×3 grid. The hit frequency sits at 48.24%, which means roughly every other spin returns something, keeping the balance relatively steady between features. Volatility is rated medium-high, so the real movement comes from the bonus rounds rather than line wins.
The wild (a red Diamond Explosion 777 logo) substitutes for all paying symbols except prize diamonds and the horseshoe scatter. During Free Games, it gains an additional function, potentially triggering Jackpot Pick on any appearance. The scatter pays anywhere on the reels and needs three or more to launch 10 Free Games. A few sessions in free play will confirm whether the hit rate sits comfortably with your preferred bet level.
Payouts are listed at a €1.00 bet level and adjust with your stake.
| Symbol | 5× | 4× | 3× |
|---|---|---|---|
| WILD | €10.00 | €2.00 | €0.40 |
| Double BAR | €10.00 | €2.00 | €0.40 |
| Single BAR | €8.00 | €1.20 | €0.20 |
| Bell | €6.00 | €1.00 | €0.20 |
| Four-Leaf Clover | €6.00 | €1.00 | €0.20 |
| Watermelon | €4.00 | €0.80 | €0.20 |
| Symbol | 5× | 4× | 3× |
|---|---|---|---|
| Lemon | €2.00 | €0.40 | €0.20 |
| Grapes | €2.00 | €0.40 | €0.20 |
| Blueberry | €2.00 | €0.40 | €0.20 |
| Cherry | €2.00 | €0.40 | €0.20 |
| Orange | €2.00 | €0.40 | €0.20 |
| Scatters | Payout |
|---|---|
| 5× | €40.00 |
| 4× | €10.00 |
| 3× | €4.00 |
| Shape | Prize Range |
|---|---|
| 1×1 | 2× total bet |
| 1×2 | 5× total bet |
| 1×3 | 9× total bet |
| 2×2 | 6×–20× total bet, Mini, or Minor |
| 2×3 | 10×–35× total bet, Mini, or Minor |
| 4×2 | 15×–40× total bet, Mini, or Minor |
| 3×3 | 20×–45× total bet, Minor, or Major |
| 5×2 | 30×–60× total bet, Minor, or Major |
| 4×3 | 40×–80× total bet, Minor, or Major |
| 5×3 | 100×–225× total bet, Major, or Grand |
Diamond Explosion 777 does something most classic-themed slots don't attempt. The three-layer feature chain creates genuine depth beneath the fruit-and-BAR surface. The 96.32% RTP is competitive, the 48.24% hit frequency keeps sessions ticking over, and the Explosion rounds deliver escalating tension that holds your attention. The standard paytable is modest and the maximum win could be higher for a medium-high volatility game, but the feature architecture lifts this well above the typical classic slot.
The €180.40 total lit up the screen after a 75x bonus buy, and it wasn’t a single fortunate spin that delivered it. The free games round chained into multiple Explosion sequences, each one adding locked diamonds to the grid while the remaining positions spun to reveal whether the cluster would grow or hold. Watching diamonds group together and the reels resolve to show what additional bonus the formation earned felt like the most deliberate piece of anticipation design we’ve encountered from RubyPlay.
We loaded the demo at a €2.00 stake, and we spent a comfortable stretch in regular play before reaching for the Buy Feature. The standard game paid steadily. Small hits landed frequently, and the balance held roughly level, consistent with that 48.24% hit frequency. Nothing dramatic, but the token symbols added a layer of interest that pure line-win play wouldn’t have provided. Every red, green, or purple 777 on the reels carried the quiet possibility of something larger happening.
The Explosion round separates this slot from the rest of the Diamond Explosion series — and RubyPlay has built several themed variants around this engine. The shapes system rewards adjacent diamond clusters on a sliding scale, from 2x for a lone diamond up to 225x or the Grand jackpot for a full 5×3 grid. What makes it work as a play experience is the duration. Seven Explosion spins are enough to build a genuine sequence where you can track the shapes forming, calculate whether the next lock will bridge two clusters, and feel the payoff when it does.
At €1.00 stakes, the Grand sits at €800, translating to 800x. The game’s theoretical maximum reaches 8,000x when stacked multipliers and optimal Explosion formations combine, pushing well beyond what the shape table alone suggests.
An alternative RTP configuration of 96.82% exists for this game. The version we played ran at 96.32% as listed in the info panel, so check which configuration is active in the demo before settling into a session.
Diamond Explosion 777 rewards patience and buy-in decisions in roughly equal measure. The three-feature architecture gives it genuine replay value, and the Explosion rounds deliver sustained tension that most classic-themed slots simply can’t match. If you enjoy watching a bonus round develop over multiple phases rather than resolving in a single spin, this is one of the stronger options in RubyPlay’s catalogue.
