Thunder Diamonds: Hold & Win

Thunder Diamonds: Hold and Win - When the Classic Meets the Storm

 

A thunderclap echoes across the screen, illuminating golden 7s that shine at the center of NeverEnding’s Thunder Diamonds: Hold and Win. The game revisits the classic aesthetic of physical slots, with bells, dice, bars, and card suits in a compact 3x3 grid with only five fixed paylines, always ready to reveal new combinations at any moment during the session.

 

Shining diamonds hide the biggest prizes of the game, collected by special symbols that accumulate on reels 1 and 3 until they trigger the winning storm of the Bonus Round. Four jackpots await those who are quick enough to collect them ante the Re-Spins run out completely, keeping the electricity always in the air for those who dare this electric adventure.

 

What are Thunder Diamonds: Hold and Win

 

The three-reel, five-line format of Thunder Diamonds: Hold and Win may seem simple at first glance, but it’s in the Bonus Round that the game really comes into its own. What sets the title apart is the way special symbols collect cash values and jackpots throughout the rounds, accumulating everything until the central Collector gathers the total displayed on the screen at that moment.

 

The developer does not officially disclose the game's volatility, but the compact format combined with a maximum prize of 3,000x the bet suggests sessions with concentrated peaks of excitement. It is a title accessible both to those seeking the nostalgic simplicity of a classic slot and to players who prefer faster, more straightforward rounds without long waits between sessions. Sessions tend to alternate between modest spins and moments of increasing tension as special symbols accumulate on the screen, with no guarantee of results.

 

How does the game work?

 

In Thunder Diamonds: Hold and Win, wins pay from left to right, requiring three matching symbols along one of the five fixed paylines on the grid. The 7 golden acts as a Wild, substituting for any standard symbol across the three available reels. Bonus symbols can appear on reels 1 and 3, carrying cash values or jackpots, while the Collector symbol appears exclusively on the middle reel and collects everything visible on the screen at that moment.

 

When Bonus symbols appear on both side reels along with at least one Collector on the center reel, the Bonus Round is activated. The Thunder Diamond Stack feature can also randomly add enough symbols to instantly trigger the same round. The results of each spin are determined by a random number generator (RNG), ensuring complete unpredictability.

 

Game rules

 

·       Wins require three identical symbols in sequence, from left to right, along one of the five fixed paylines.

·       The golden 7 functions as Wild and substitutes for any standard symbol on any of the three available reels.

·       Bonus symbols on reels 1 and 3, combined with at least one Collector symbol on the center reel, activate the Bonus Round.

·       The Bonus Round starts with three Re-Spins, which are reset whenever a new symbol appears on the grid.

·       Up to three Collector symbols can remain fixed simultaneously during the Bonus Round, accumulating values separately.

·       Spinning the reels is a manual action by the player, while the collection of values and the drawing of jackpots are automatically calculated by the system.

 

Technical details

 

Type of game	Online Slot machine
Grid	3x3
RTP	96,08%
Volatility	N/A
Minimum bet	€0.10 (or the equivalent amount in your currency)
Maximum bet	€75 (or the equivalent amount in your currency)
Maximum payment	3,000x your bet
Mechanic	5 fixed paylines, Collector symbol (central reel), Thunder Diamond Stack feature, 4 fixed jackpots (Mini, Minor, Major, Grand), Hold and Win with up to 3 Re-Spins, Bonus Buy.
Provider	NeverEnding
Platform	Computer and mobile devices

 

How to Play: Special Features and Mechanics

 

Before spinning in Thunder Diamonds: In Hold and Win, the player sets the bet amount from the available options, as the five paylines remain fixed. Throughout the base game, it is worth paying attention to the Bonus symbols that can appear on reels 1 and 3, carrying cash values ranging from 1x to 20x the bet, or even one of the four fixed jackpots.

 

The Collection symbol, exclusive to the central reel, gathers all these values whenever it appears. By gathering Bonus symbols on both side reels along with a Collector, the Bonus Round begins, and each new symbol that appears keeps the Re-Spins at three, allowing up to three Collectors to remain fixed at the same time. Those who prefer to jump straight into the action can use the Bonus Buy for 60x the bet, guaranteeing Bonus symbols and a Collector right at the start. The game also features Auto Play and Turbo Mode.

 

RTP and Volatility

 

Thunder Diamonds: Hold and Win returns, on average and over the long term, 96.08% of all wagers, regardless of the results of any single session. The developer does not officially disclose the game's volatility, but the compact format of only nine positions, combined with a maximum prize of 3,000x the bet, suggests sessions with peaks of tension concentrated in the Bonus Round.

 

This translates into spins that can go unnoticed until the Bonus and Collector symbols align. As with any slot, the results always remain random, with no guarantee of outcome.

 

Tips to Improve Your Experience in the game

 

The compact format of Thunder Diamonds: Hold and Win tends to alternate between long, quiet periods and occasional spikes, so it’s a good idea to figure out how many spins you plan to play before you start. Observing the values accumulated by the Collector during the Bonus Round helps to understand the potential of the sequence even before it ends.

 

Testing the Bonus Buy in demo mode before purchasing it with real money helps decide if the fixed cost of 60x the bet makes sense. A common mistake is to up the ante expecting to speed up the arrival of Bonus symbols, since this chance does not change according to the amount wagered. Playing at a relaxed pace, enjoying the game's retro aesthetic, tends to make the experience more enjoyable.

 

What makes this game so popular?

 

The contrast between classic symbols, such as bells and bars, and the electric atmosphere of lightning and thunder gives Thunder Diamonds: Hold and Win a visual identity that sets it apart from traditional retro slots. The compact grid of just nine positions makes the game easy to understand even for those who have never played a Hold and Win format before, as you only need to follow the Bonus symbols and the central Collector on the screen.

 

The pace of the rounds is fast, and the possibility of up to three Collectors staying fixed at the same time adds an extra layer of visual excitement, without promising fixed results. The game works well on both large screens and mobile devices, keeping all elements visible even on the reduced grid. Nostalgia and visual electricity go hand in hand in this format, which explains much of the growing interest in the game since its release.

 

Who developed Thunder Diamonds: Hold and Win

 

NeverEnding, a Cyprus-based studio, is behind Thunder Diamonds: Hold and Win, one of the titles released since the studio's market debut in January 2026. Although recent, the company has already expanded its presence with offices in Barcelona, Warsaw, and Kiev, consolidating a catalog focused on Hold and Win formats and classic physical casino themes.

 

The visual and sound presentation quality of this title reinforces the developer's commitment to investing in technically refined productions within this established genre.

 

Similar games

 

The diamond theme from Thunder Diamonds: Hold and Win was also featured in Wild Joker's Diamonds, NeverEnding's debut title on the market, which had already explored this same classic aesthetic prior to this most recent release.

 

Beyond the developer's catalog, it's also worth checking out Rockin' Joker: Hold and Win by Playson and Blazing Coins Deluxe by Popiplay, both of which feature classic themes and their own prize-collection mechanics. Each of these titles has its own pace, and it's worth trying more than one until you find the one that best matches your game style.

 

More details about Thunder Diamonds: Hold and Win

 

What does the Collector symbol do?

The Collector appears exclusively on the central reel and gathers all the cash values and visible jackpots on the screen at the exact moment it appears, adding them to the final total of the round.

 

Is it possible to have more than one Collector at the same time?

Yes, up to three Collector symbols can remain fixed simultaneously during the bonus round, each accumulating its own values until the end of the available Re-Spins.

 

What is the Thunder Diamond Stack feature?

It is a random feature that can occur during the base game whenever a Bonus symbol appears, adding enough extra symbols to instantly activate the Bonus Round.

 

How much does the Bonus Buy cost?

The Bonus Buy costs 60x the value of the bet and guarantees Bonus symbols on reels 1 and 3, as well as a Collector symbol on the middle reel, right at the start of the round.