What is the RTP of Diamond Prime?

The rules list 96.00% for the game overall and 96.28% for the Free Spins Buy feature.

How do you trigger Free Spins in Diamond Prime?

Land a Bonus and/or Mystery Jackpot symbol on all 3 reels. The Gold Stack feature can also add these symbols at random when they land on only one or two reels.

How much does the Diamond Prime bonus buy cost?

Free Spins can be bought for 40x the current total bet, for example $40 at a $1 bet.

How big are the Diamond Prime jackpots?

They are fixed multiples of the total bet: Grand 1,000x, Major 100x, Minor 30x and Mini 15x. You need 5, 4, 3 and 2 matching jackpot symbols respectively during Free Spins.

Can you retrigger Diamond Prime Free Spins?

Each free spin that lands 3 or more Bonus and/or Mystery Jackpot symbols awards one extra Free Spin.

Can I play Diamond Prime for free in Canada?

Yes. The Diamond Prime demo on CasinoDemo is free, needs no sign-up and uses virtual credits only.

Diamond Prime Guide: Rules, Jackpot Free Spins, Gold Stack and Bonus Buy

By the CasinoDemo editorial team · Updated 2026-11-09 · How we review

Diamond Prime is a compact Platipus slot: three reels, three rows and five fixed paylines, with a hold-and-collect style Free Spins round sitting on top. The base game is classic fruit-machine stuff with sevens, bells, dice and BAR symbols. The real action is in the diamonds, which pay instant cash prizes and fill four jackpot meters worth up to 1,000x the total bet.

We played the demo, read every rules page and bought the Free Spins feature to see how it runs. Here is what the rules say and what happened on our screen.

Play Diamond Prime demo for free

Diamond Prime at a glance

Provider: Platipus
RTP: 96.21%
Volatility: Medium
Demo: Free, no sign-up

How Diamond Prime works

The grid is 3x3 with 5 fixed paylines: the three rows plus the two diagonals. Wins pay left to right in succession, only the highest win per line is paid, and wins on different lines are added together. Payouts are the line bet multiplied by the symbol's multiplier, and the line bet is one fifth of the total bet.

The paytable shown at a $0.20 line bet ($1 total) lists three-of-a-kind values only: Lucky 7s pay $30, Bells $20, Dice and BAR $16 each, and the four suit symbols (spades, diamonds, clubs, hearts) $4 each. Three Wilds pay $250 at that same bet, which is 250x the total bet and the best line hit in the game.

The rules also mention Flash Win, an instant-win mechanic that can trigger after a spin and awards a random amount. We did not see it during our session.

Diamond Prime base game with 3x3 reels and Grand, Major, Minor and Mini jackpot meters — The base game at a $1 total bet, with the four jackpot meters above the reels.

Special symbols

The Wild appears on any reel in the main game only. It substitutes for every symbol except the Bonus and Mystery Jackpot symbols.

The Bonus symbol is the white diamond. It can land on any reel in the main game and in Free Spins, and it carries a cash prize of 1, 2, 3, 4, 5, 7 or 10x the total bet. It does not form line wins.

The Mystery Jackpot symbol also lands anywhere in both modes. It does not pay on lines; during Free Spins it transforms into a Mini, Minor, Major or Grand Jackpot symbol. The jackpot values are fixed multiples of the total bet: Grand 1,000x, Major 100x, Minor 30x and Mini 15x.

Free Spins feature and jackpot meters

Free Spins start when a Bonus and/or Mystery Jackpot symbol lands on all 3 reels. You get 6 Free Spins, and during the round only Bonus and Mystery Jackpot symbols can land. Any spin that lands 3 or more of them awards 1 extra Free Spin.

Bonus prizes are added to the total win the moment they land. Jackpot symbols fill indicator meters instead: 2 Mini symbols win the Mini, 3 Minor symbols the Minor, 4 Major symbols the Major and 5 Grand symbols the Grand. Extra jackpot symbols carry over toward the next jackpot of the same type, so you can win the same jackpot more than once in a round. Carried-over symbols count toward the total win and the meters just like fresh ones. Any progress short of a full meter resets when the feature ends.

The Grand needs five matching symbols in a round that usually lasts six or seven spins, which tells you how rare that 1,000x hit is meant to be.

Diamond Prime Free Spins with two 1.00 Bonus diamonds landing on the top row — Bonus prizes add to the running total as soon as they land.

Green Mini jackpot symbol landing during Diamond Prime Free Spins with three 1.00 Bonus diamonds below — A Mini jackpot symbol lands on the last free spin.

Gold Stack feature

Gold Stack can trigger at random in the main game when a Bonus and/or Mystery Jackpot symbol lands on only one or two reels. When it hits, extra Bonus and/or Mystery Jackpot symbols are added to the screen to start Free Spins. The paytable adds that the diamond pile above the reels changes only for show and does not affect the chance of Gold Stack triggering.

Bonus Buy: what it costs and what we got

The cart button opens a single option: Free Spins for 40x the total bet ($40.00 at a $1 bet). The game then plays a spin guaranteed to trigger the feature, and the purchased round follows the same rules as a natural one. The paytable lists the Buy feature RTP for Free Spins at 96.28%, slightly above the 96.00% base figure.

We bought it once at a $1 total bet. Our round paid a modest stream of 1.00 Bonus prizes, and a Mini jackpot symbol landed on the final spin. The total win screen showed $47.00, about 47x the bet, so this single round returned $7 more than its $40 price. That is one round only, not an average, and plenty of rounds will pay less than the cost.

Diamond Prime Buy Bonus menu offering Free Spins for $40.00 at a $1.00 total bet — The only buy option: Free Spins at 40x the bet.

Diamond Prime trigger spin after buying the bonus, with diamonds bursting over the reels — The guaranteed trigger spin after our purchase.

Diamond Prime Free Spins total win screen showing $47.00 — Our bought round finished at $47.00 on a $1 bet.

RTP, jackpots and bet range

The game rules give an overall RTP of 96.00% for any bet, and 96.28% for the bought Free Spins. The rules do not publish a volatility rating, a maximum win cap or hit odds, though the game does show a message when a maximum win limit is reached. The largest fixed prize in the paytable is the Grand Jackpot at 1,000x the total bet.

The demo started with a $10,000 balance and a $1.00 total bet. Its bet list runs from $0.20 to $20 per line across 5 lines, which works out to $1 to $100 per spin.

Our verdict

Diamond Prime keeps things tight: a three-reel base game with small line pays, and a short Free Spins round where the diamonds do the work. The jackpot meters give each Mystery symbol some tension, and carry-over means a lucky round can stack several Minis or Minors. Most of the value sits in the feature, so the 40x buy at 96.28% RTP is the quickest way to see what the game is about. Our one bought round paid 47x, which is a fair picture of an ordinary round rather than a big one.

How to play Diamond Prime free in Canada

Press Play demo for free on the game page and the Platipus demo loads with virtual credits. There is nothing to download, no account to create and no deposit to make, and it works in your browser on desktop and mobile.

Demo credits have no cash value, so you can test bet sizes, trigger the features and learn the paytable without risking anything.

Playing Diamond Prime for real money in Canada

Real-money online gambling in Canada is regulated province by province. Ontario runs a regulated market where licensed operators are overseen by iGaming Ontario and the AGCO; other provinces offer play through their own provincial sites, such as PlayNow (British Columbia, Manitoba and Saskatchewan), Loto-Québec, PlayAlberta and ALC in Atlantic Canada.

The legal age is 19 in most provinces and 18 in Alberta, Manitoba and Quebec. Only play at sites licensed where you live, set limits before you start, and treat gambling as entertainment, never as a way to make money.

Diamond Prime FAQ

What is the RTP of Diamond Prime?: The rules list 96.00% for the game overall and 96.28% for the Free Spins Buy feature.
How do you trigger Free Spins in Diamond Prime?: Land a Bonus and/or Mystery Jackpot symbol on all 3 reels. The Gold Stack feature can also add these symbols at random when they land on only one or two reels.
How much does the Diamond Prime bonus buy cost?: Free Spins can be bought for 40x the current total bet, for example $40 at a $1 bet.
How big are the Diamond Prime jackpots?: They are fixed multiples of the total bet: Grand 1,000x, Major 100x, Minor 30x and Mini 15x. You need 5, 4, 3 and 2 matching jackpot symbols respectively during Free Spins.
Can you retrigger Diamond Prime Free Spins?: Each free spin that lands 3 or more Bonus and/or Mystery Jackpot symbols awards one extra Free Spin.
Can I play Diamond Prime for free in Canada?: Yes. The Diamond Prime demo on CasinoDemo is free, needs no sign-up and uses virtual credits only.