Diamond Explosion 7s

Diamond Explosion 7s Slot Review

Right, so let me give you the full picture in this Diamond Explosion 7s review — what's going on here is genuinely worth your attention. Diamond Explosion 7s RubyPlay is a 5-reel, 3-row video slot played across 50 fixed paylines — and honestly, it packages so much into what looks like a fairly straightforward fruit-machine shell. RubyPlay released this beauty as part of their popular Diamond Explosion series, and it basically ticks every box: Free Games with a Wild Reel mechanic, a randomly triggered Jackpot Pick Deluxe, and the crown jewel — Link It Up Explosion, a hold-and-respin bonus that can fill the entire board with Prize symbols worth eye-watering amounts. I tried the Diamond Explosion 7s demo first, which I'd genuinely recommend to anyone who wants to get a feel for how these features interact before committing real funds.

General Characteristics of Diamond Explosion 7s

Theme and Story

So, the theme is classic Vegas glamour with a fruit-machine twist. We're talking cherries, watermelons, golden 7s, horseshoes, and big sparkling diamonds — all arranged with that unmistakably retro-meets-modern aesthetic that RubyPlay does so well. There's no elaborate narrative here, and honestly, that's sort of the point. It's unapologetically old-school in its spirit, but the production values are thoroughly modern, giving it that feel of a vintage slot machine that's been completely reimagined for a contemporary Diamond Explosion 7s casino audience. The diamonds, in particular, carry a real sense of weight — they're the Prize symbols, and when six or more land on the reels, something special happens.

Visuals and Music

The visuals are crisp, colourful, and genuinely satisfying — there's a real depth to the symbol artwork, with the diamonds practically glowing off the screen. The reels have that warm, golden-framed look that makes everything feel a bit premium, a little bit showbiz. Animations during the Link It Up Explosion bonus are particularly well done — watching those Prize symbols lock into position and form larger shapes is, quite frankly, a bit thrilling. The soundtrack leans into the classic fruit machine territory: upbeat, slightly jazzy, with satisfying audio cues on every win. Nothing groundbreaking, but it fits the mood perfectly and keeps the energy up across longer sessions.

Technical Specifications

The Diamond Explosion 7s RTP sits at a very solid 96.82%, which is genuinely above average for the genre and gives you a decent statistical foundation going in.

Gameplay Mechanics of Diamond Explosion 7s

Slot Type

Diamond Explosion 7s is a 5-reel, 3-row video slot — a format that feels instantly familiar, yet the layered bonus system gives it a depth that goes well beyond the typical setup. With 50 paylines, wins pay left to right from the leftmost reel, and only the highest win per line is paid out. Bet line wins are cumulative across different lines, so you can stack multiple wins in a single spin. The Total Bet scales the Paytable proportionally, which is worth bearing in mind if you're used to playing at different stake levels. It's very much a slot you can pick up immediately, yet one that rewards you for understanding how its three bonus systems interact.

Special Symbols

The symbols in this game each have a pretty distinct visual identity, which I appreciate:

• Wild (Logo): The Diamond Explosion 7s logo symbol — a bold, ornate badge — substitutes for all regular paytable symbols except Scatter and Prize. In the base game it's your standard substitution wild, but during Free Games it acts as both a Wild and a Prize symbol on the chosen reel, which is where things get interesting.
• Scatter (Horseshoe): A gleaming golden horseshoe — three or more anywhere on the reels trigger the Free Games feature. Critically, four Scatters award 8 free games plus a 5x total bet boost, and five Scatters give 8 free games plus a 20x total bet multiplier.
• Prize / Prize-Wild (Diamond): The large sparkling diamond is the heart of the whole game. Six or more of these trigger Link It Up Explosion; during Free Games, the chosen Wild Reel turns every position into a symbol that counts as both Wild and Prize simultaneously.

Unique Mechanics

The standout mechanic is the Wild Reel in Free Games — at the start of each free spin, one reel is randomly selected and every single symbol on it becomes a Prize/Wild hybrid. That's a massive deal because it not only helps complete payline wins but simultaneously contributes towards the six-Prize threshold needed to trigger Link It Up Explosion mid-feature. The other mechanical flourish worth noting is the Prize shape system in Link It Up Explosion: adjacent Prize symbols don't just pay individually — they combine into the largest possible rectangular shape, unlocking significantly higher multipliers. A 5x3 fill, for instance, can award anywhere from 100x to 225x your total bet, or even the Grand jackpot. Each Prize symbol can only belong to one shape, so the game is essentially rewarding you for density.

Bonus Features of Diamond Explosion 7s

Free Games

The Free Games feature is triggered by landing three or more Scatter symbols anywhere on the reels. Three Scatters gives you 8 free spins at your current bet value — but four Scatters awards those same 8 spins with a 5x total bet multiplier applied for the duration, and five Scatters hands you 8 spins at a whopping 20x multiplier. That's not a typo. During every individual free spin, the game randomly selects one reel where every symbol becomes simultaneously a Wild and a Prize symbol. The practical effect is that triggering Link It Up Explosion mid-feature becomes considerably more likely than in the base game. Re-triggers are possible — landing three or more Scatters during Free Games awards the same number of spins as the original trigger, added directly to your remaining count. Any Diamond Explosion 7s free spins won this way stack rather than restart.

Link It Up Explosion

This is the one that really makes Diamond Explosion 7s game stand out. The trigger condition is six or more Prize symbols in the base game, or six or more Prize and/or Prize/Wild combined symbols during Free Games. Once triggered, the normal reels are replaced with special reels containing only Prize symbols and empty spaces — and you're awarded 5 Explosion Free Games. Here's the key mechanic: any Prize symbol that lands after each Explosion Free Game locks into position and stays there until the bonus ends. After every spin, adjacent Prize symbols combine to form the largest possible rectangular shapes, which then pay out according to the Paytable. The bonus ends either when all five Explosion Free Games are used up or when every position on the grid is filled with Prize symbols — whichever comes first. A full 5x3 board is the dream scenario, since it creates a single 5x3 shape worth 100x–225x your total bet or the Grand jackpot. The Prize symbol values shown on screen are all paid out at the end.

Prize Shape Paytable

Adjacent Prize symbols form these shapes and their corresponding prize ranges:

Jackpot Pick Deluxe

The Jackpot Pick Deluxe is the random treat that can appear out of nowhere. During both the base game and Free Games, a Wild symbol can randomly trigger this bonus — only one Jackpot Pick per game is possible, and any existing win combinations are paid first. When it fires, you're presented with 12 coins to pick from. Each reveals one of four jackpot levels — Mini (10x total bet), Minor (15x total bet), Major (50x total bet), or Grand (800x total bet) — or a multiplier of 2x, 3x, 5x, or 10x. You keep picking until three of the same jackpot level have been revealed, at which point you're awarded that prize. If your matching three include a multiplier, the jackpot value is multiplied accordingly — so a Grand with a 10x multiplier would theoretically deliver 8,000x your total bet, which is the maximum win for the game.

Activation Strategies

Practically speaking, the Free Games are your most reliably triggered route into something substantial. I'd say the combination of playing at a moderate stake with Autoplay is quite a decent approach for the base game, since the 48.24% hit frequency means regular small wins keep your balance relatively steady between feature triggers. If you're specifically chasing Link It Up Explosion, the Free Games Wild Reel mechanic is your best friend — it dramatically increases the probability of hitting six Prize symbols on any given free spin. The Jackpot Pick is purely random and can't really be strategised around, but it's an absolute delight when it fires unexpectedly.

Win Potential

The max win of 8,000x is achievable through the Jackpot Pick Deluxe with a Grand jackpot and a 10x multiplier in play. In more realistic terms, a well-populated Link It Up Explosion with multiple large shapes — a 4×3 block or a full 5×3 coverage — can deliver wins in the range of 40x–225x per shape, and multiple shapes can be paid out simultaneously if the board allows. For example, you might end up with two 3×2 shapes and one 2×2 on the same board, all paying independently. During play Diamond Explosion 7s at a 5x multiplier trigger, that effective bet scaling means even mid-range shape wins feel genuinely significant.

Conclusion and Overall Rating of Diamond Explosion 7s

Honestly, Diamond Explosion 7s has become one of my go-to spins when I want something that feels both nostalgic and properly feature-rich. The combination of three distinct bonus systems — Free Games with the Wild Reel, Link It Up Explosion, and the randomly triggered Jackpot Pick Deluxe — means there's rarely a dull moment, and the 96.82% RTP gives you a solid statistical footing. I'd recommend it to anyone who enjoys fruit-machine aesthetics but wants something with real mechanical depth underneath the surface.

If you're a newer player, the Diamond Explosion 7s demo is genuinely the place to start — the Link It Up Explosion mechanic has a few layers to it that are much better understood through play than description.

A thoroughly satisfying, well-constructed slot that balances accessibility with genuine depth — 4.0 out of 5.0, held back only slightly by the medium/high volatility, which can make the feature-free stretches feel a bit drawn-out.

What Else to Play?

If Diamond Explosion 7s has got your attention with its mix of classic fruit-machine charm, stacking jackpots, and that satisfying hold-and-respin mechanic, then you'll likely find a lot to love in these other titles from the same provider. RubyPlay has a real knack for building layered bonus systems into visually approachable slots, and the three games below all share that same DNA in their own distinct ways:

• Diamond Explosion Sweet Love — A romantic, Valentine's-themed entry in the Diamond Explosion series with the same core mechanics you already know: Link It Up Explosion, Jackpot Pick Deluxe, and Free Games with a Wild Reel. The Prize shape system is identical, but wrapped in hearts, chocolates, and pastel colours — it's essentially Diamond Explosion 7s wearing a very charming costume.
• Immortal Ways Champions — A 6-reel slot with an Olympic sports theme, 10,000 ways to win, and a coin-collection mechanic called Immortal Arrays that rewards patience similarly to Link It Up Explosion. RTP of 96.28% and a Buy Feature make it a natural step sideways for players who enjoy persistent-symbol bonus rounds.
• J Mania Lucky Pyggs — A compact 3×3 slot from RubyPlay with three entirely different bonus features: Free Spins with escalating Wild multipliers, a J Mania hold-and-respin round with a collector mechanic, and a Jackpot Pick game with multiplier boosts. High volatility, 96.36% RTP, and a pleasingly chaotic energy.

All three are available to try as free demos before you commit to play Diamond Explosion 7s for fun or any of the others, which is absolutely the sensible approach when you're getting to know a new provider's mechanics. RubyPlay's catalogue is genuinely worth exploring — there's a consistency of quality across their titles that makes browsing it feel rather rewarding in itself.