Diamond Prime

Diamond Prime is a classic-style 3x3 slot from Platipus, released on 5 November 2026. It plays on five fixed paylines, adds four fixed jackpots and builds its whole bonus round around cut gemstones, and it does all of this in a neon-blue vault setting that looks more like a jewellery counter than a casino floor. It is a short, quick game with very few moving parts, and that is exactly what makes it easy to understand within a few spins.

A Vault Of Cut Gems

The first thing you see is a huge faceted diamond floating above the reels, with a heap of smaller stones piled on the frame and rays of light shooting from behind. Four jackpot plates are fixed above the grid, so the target prizes are in view at all times. The reels themselves are a dark panel with sharp, bright symbols: red hearts and diamonds, purple clubs and spades, BAR plates, glowing red sevens and, of course, gems. The look is a clear nod to the old fruit-machine era, but the lighting and the lightning effects around the frame give it a modern finish.

Because the grid has only three reels and three rows, there is no clutter. A winning line is easy to spot, and the game can be played at a calm pace or in turbo mode, which you start by pressing and keeping the spin button down.

Base Game On Five Fixed Lines

The base game pays from five fixed paylines, so there are no line settings to adjust, and the only choice you make is the total stake. The symbol set mixes the four card suits with BAR and seven symbols, and these form simple line wins. What makes the base game more than a plain three-reel slot is the two special symbols that sit next to the regular ones: the Bonus coins and the Mystery Jackpot symbols. Landing them is the way into the free spins, and they are also what the rest of the game revolves around.

Four Jackpots

Four jackpots are displayed above the reels, and each of them has its own colour. At a stake of 1.00 the plates read like this:

• Mini, green, 15x the total bet;
• Minor, blue, 30x the total bet;
• Major, purple, 100x the total bet;
• Grand, red, 1,000x the total bet.

The jackpot values scale directly with your stake, so they are fixed multipliers and not progressive pools. The Grand prize of 1,000x is the highest figure the game advertises, and it is the one that the opening screen points at with its big red arrow.

The Free Spins Round

The bonus works as 6 free spins. When it starts, the grid turns into a dark panel with an empty gem outline in each position, and a running total appears at the bottom of the frame. During the free spins, the symbols that land are coins carrying cash values and gemstones that stand for the jackpots. The instruction on the opening screen sums it up well: collect jackpot symbols during the free spins to win multiple jackpots.

A few things happen over the course of the round:

• Coins that land on the grid carry a cash prize, and in the round we played the values ranged from 0.20x to 5x of the stake. They are added to the total at the bottom of the grid.
• Blue and purple gems light up the Minor and Major jackpot plates as they land, and their prizes are added in the same way.
• A +1 Spin message appears when the spin counter goes up by one, which is a welcome extension in a round that has only six spins to begin with.
• Electric arcs run around the frame, and a big total-win banner closes the round.

The structure rewards patience. Many of the free spins come with only a single coin on the screen, and then one spin fills several positions and changes the total in one go.

Controls And Pace

The game opens with a short intro screen that shows the jackpot plates, a large red diamond flying towards the Grand prize and a single Start button. After that the interface stays minimal. The stake selector with its two arrows sits at the bottom right, the cart button opens the bonus shop, a sound toggle and a full-screen button sit in the corners, and the round spin button on the right carries the “hold for turbo” hint. A small fast-forward icon sits below it.

The balance and the total bet are always visible at the bottom of the screen, and the status line in the middle says “Play 5 lines”, a handy reminder that the line count is fixed.

Buy Feature

A blue cart button next to the stake selector opens the bonus shop. It offers the free spins directly for 40x the total bet, so a 1.00 stake costs 40.00. In a bought round at that stake the free spins finished with a total win of 64.00, which is 64x the stake, and it came with an Extra Win banner on the way out. As with every bonus buy, one round tells you very little, and results swing a lot from round to round.

One more point about expectations: the 1,000x Grand prize is the top figure shown anywhere in the game, and all the listed values scale with the stake. That makes Diamond Prime a game for short sessions with clear targets, and the combination of a modest layout, low clutter and a bonus you can buy at 40x makes it easy to judge in a demo before choosing a stake.

Our Impression

Diamond Prime is a compact game for people who like their slots uncomplicated. There is no cascading, no Megaways-style reel shifting and no long feature chain, just a three-by-three grid, coins, gems and four jackpot targets. The free spins are fun to follow, because every landed gem makes a visible difference to the total, and the instant buy option makes the game convenient for short sessions. Players who want a big headline multiplier or a lot of mechanics will find it modest, but it is a clean and polished release that suits a quick demo run.