More Free Diamond Slot Machine Games
Info About the Online Double Diamond Slot
| Genre | Classic Slot |
|---|---|
| Developer | IGT |
| RTP | 95.44% |
| Volatility | High |
| Min/Max Bet | $1 / $250 |
| Max Win | 1,000x |
| Reels | 3 |
| Paylines | 1 |
Double Diamond dates back to 1989, when IGT’s electromechanical S2000-line of slot machines was introduced. It’s recognizable by 7s, cherries, BARs, diamonds, as well as the iconic color scheme: pink and green contrasting on a black background.
These old ‘one-armed bandits’ can still be found in Las Vegas today, as they are just that iconic. You’ll also commonly find sequels, such as Double Diamond Deluxe and Triple Double Diamond, on casino floors. In 2023, the game even came to IGT’s DiamondRS1, an ultra-high definition cabinet catering to the modern-day high-limit slot player.
Some lesser-known variants are Double Diamond 2000, Run, Haywire, and Reel MultiPLAY. For those who wish to play those online for free, I’ll have to disappoint you; none have online versions. Either way, the original version is what it’s all about, and that Double Diamond slot demo is playable for free here at Cool Old Games:
- No download or registration, play directly inside your browser
- Mobile and desktop support with a full-screen mode for a better experience
- Play at your own pace without limitations or pop-up ads
How it Works: Game Mechanics & Rules
As seen in the screenshot above, Double Diamond is about as stripped-back as an online slot can get, and I mean that in a good way. You have 3 reels, 3 rows, and just 1 payline running straight across the middle. If the symbols do not line up on that center row, nothing else matters. There are no free spins, no pick bonus, and no side feature waiting to bail out a quiet session.
This is one of those old IGT classics built around cherries, BARs, and sevens. Reminding me of IGT’s Red, White & Blue slot. If you mainly play newer slots with expanding reels and bonus rounds every few minutes, this may feel too bare-bones. But if you like old Vegas-style machines, like us, I think this is the gold standard.
Paul Dunlop – Cool Old Games
All Symbols & Paytable
The theme is all about familiar casino symbols and a bright cabinet-style presentation. No storyline, no mythology, no characters.
The paytable is easy to learn, which is one of the reasons this slot still works. Most of the action comes from cherries, BAR combinations, and the Double Diamond symbol.
| Symbol | 3 of a Kind | 2 of a Kind | One |
|---|---|---|---|
| Double Diamond | 1,000x | – | – |
| 7 | 80x | – | – |
| Triple BAR | 40x | – | – |
| Double BAR | 25x | – | – |
| Single BAR | 10x | – | – |
| Cherry | 10x | 5x | 2x |
| Any BAR | 5x | – | – |
Double Diamond Symbol
This is the one you should really care about. Three of them across the payline award the 1,000x top prize, the jackpot basically.
More often, though, I’ve got one or two of them mixed into another winning line. That is where the multiplier effect kicks in:
- One Double Diamond doubles a valid win.
- Two of them multiply a valid win by four.
That essentially is the mechanic that gives the slot its big-win potential outside of the top award.
Cherry Symbol
The cherries are what keep the game from feeling completely dead to me. Any result with one or more cherries on the payline is a winner, and that applies regardless of which reel the cherry lands on. So even though this is a high-risk game overall, you do at least get those smaller interruptions now and then.
BAR symbol
The BAR symbols are the other backbone of the game. You can hit matching single, double, or triple BAR payouts, but you can also get paid for a mixed Any-Bar result. In my sessions, BAR combinations felt quite common.
Rules to Be Aware of
There are a few rule details here that are worth knowing, because I can easily see newer players getting confused by them:
- A Diamond symbol on its own is not automatically a winner. If it lands with blanks and does not complete a valid line, it pays nothing.
- Two Diamond symbols and a blank also pay nothing.
- If the symbol is going to substitute for a cherry, there must already be a cherry somewhere else on the payline. Those are small details, but they matter.
Also note that only the highest winner is paid. So if a result could be read in more than one way, the game only awards the best outcome available. Again, pretty simple once you know it, but helpful to understand before you start wondering why a spin paid less or more than expected.
So Does Double Diamonds Really Have No Bonus Feature?
Indeed, there are no bonus rounds here in the modern sense. No free games, no wheel, no gamble round, no second screen. Double Diamond lives or dies by its paytable.
That will either sound accommodating or boring, depending on what kind of player you are. Personally, I think it works because the core symbol rules are just interesting (and nostalgic) enough to carry the whole game.
My Experience With Its Volatility & RTP
The official RTP is 95.44%, which is decent enough for an older 3-reel slot, but nothing special by modern online standards. The bigger story for me is the volatility. It’s mostly described as a high-volatility feel, and that matches what I would expect from a 1-line game that leans so heavily on full symbol matches and multiplier-assisted hits.
I can confirm that the game can go quiet for a while. You do get some help from the cherry payouts and the Any-Bar wins, but this is still not the kind of slot that keeps throwing small wins at you. For me, Double Diamond feels like one of those games where the session can become a bit boring right up until one line properly connects.
That is also why I would not describe it as a casual “just spin forever” slot unless you are keeping stakes low. The pace is quick and the rules are easy, but the swings can still creep up on you. On the other hand, if you like old-school slots because every decent win feels like it actually means something, this game does that very well.
How to Play Double Diamond Slots Online
Step 1: Start with the Free Version on Cool Old Games
The best place to begin is the free browser version. That gives you time to understand the payline, the cherry payouts, and the Double Diamond rules without putting real money on the line.
Here on CoolOldGames.com, you can play on desktop, tablet, or mobile, and you can use full-screen mode for a clearer view of the reels. It’s the ideal way to learn a game like this, because there is no pressure to rush.
Step 2: Pick a Bet Size You Can Actually Sit With
Since there is only one payline, the setup is very straightforward. You are not choosing lines or unlocking anything before the spin. Your main choice is simply the bet size. Your options are 1, 2, 3, 5, 10, 20, 30, 50, 100, 200, or 250 credits per bet.
My advice here would be to keep it modest at first, even if the game looks simple enough to blast through quickly. Double Diamond can move fast, and because there is just one line, dry patches stand out more. A smaller stake gives you time to see how often the cherries and BAR wins are showing up, and whether the session feels worth extending.
Tip: There is also an Auto Play option, so you don’t have to click the spin button yourself.
Step 3: Keep Your Eyes on the Center Row and Learn the Small Rules
This is the game-specific part that matters most. Every win has to land on the middle line, so train your eye to check that row first. After that, pay attention to the little things: cherries can pay without a full match, mixed BARs can still win, and Double Diamond symbols only help if they complete a valid result.
If I were practicing this slot for the first time, that is exactly what I would focus on. Not chasing the 1,000x hit straight away, but just getting used to how the machine actually reads a winning line.
Step 4: Move to Real Money If You Truly Enjoy This Type of Slot
If you like the demo and want to play for real, the usual process is simple enough: pick a US online casino, sign up, verify your details, deposit, and then search for the slot in the lobby.
If the original Double Diamond by IGT is not available at your preferred online casino, don’t worry. There are plenty of 3-reel Diamond-themed slots at most sites. Some of them even add a bit more features, which might suit certain players better.
Some relatively similar alternatives are:
- Top Diamond by Dragon Gaming
- Diamond Strip by Nucleus Gaming
- Reels of Fortune by Qora Games
Important: only play for real money if gambling is legal where you are, you are of legal age, and you are comfortable sticking to limits. For help, reach out to 1-800-GAMBLER. You can also see our responsible gaming guide for more information.
Editor’s Opinion: Who Is the Free Double Diamond Slot For?
Playing Double Diamond for free on COG is the way to go if you want to practice without risk, get used to the rules in your browser, and see whether this kind of old-school single-line slot still does anything for you. No downloads, no pressure, and no need to throw money at a game you may only end up liking for ten minutes.
Who I think it’s for:
- Players who genuinely enjoy old Vegas-style (3) reel slots
- People who like very clear rules and fast spins
- Nostalgia-driven players who recognize cherries, BARs, and sevens instantly
- Anyone who prefers one strong core mechanic over a pile of bonus features
Those who might not enjoy it:
- Players who want free spins or bonus rounds to break things up
- Anyone who gets bored quickly with repetitive base-game action
- People who prefer lower-volatility slots with steadier feedback
- Players who want modern visuals and more going on around the reels
For me, Double Diamond is one of those games that is easy to respect for its nostalgic appeal, even if it will not be for everyone. If that old-school style sounds good to you, simply scroll up and get and find out why IGT labeled it a player favorite2.
Sources
- IGT – Double Diamond™ Slots Featuring Product Demo
https://www.youtube.com/watch?v=7O0TQsnl_gQ ↩︎ - International Game Technology. IGT’s Double Diamond® Slots Named Favorite Reel Slot. PR Newswire.
https://www.prnewswire.com/news-releases/igts-double-diamond-slots-named-favorite-reel-slot-103042994.html ↩︎
