Expert Double Diamond Slot Review and Free Demo

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Known for its high volatility and generous payouts, the single-line Double Diamond slot from IGT remains a popular choice among classic slot fans. Try the free demo and read our full review to see how it compares.

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Double Diamond Slot Key Features

Year Created 2005
Software Provider IGT
Reels 3
Paylines 1
Min Coins per Line 1
Max Coins per Line 250
Min Bet 1
Max Bet 250
Max Payout 1000x
RTP (%) 95.44%
Theme Diamonds
Type Video Slot
Volatility High
Mobile Compatible Yes
Languages English

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Double Diamond Slot Machine Overview

You’ll appreciate the IGT Double Diamond slot machine’s vintage style and modern touch. It originally graced land-based casinos after its launch in 2005 before entering the digital world. Since its release, the game has garnered numerous positive reviews from slot players appreciating its simplicity.

It’s widely recognized as ‘The dazzling hit that launched a gaming revolution!’

The Double Diamond online slot is crafted around a straightforward 3-reel framework and operates on a single payline. One of its standout elements is the multiplier, which can amplify winnings by up to 1,000x the original bet. The theoretically expected payback (RTP) is 95.44%, slightly below the industry average.

Most modern online slots use medium volatility to balance win sizes and frequency. In the Double Diamond slot, the high volatility remains a highlight. However, it’s important to note that payouts might take longer to activate but are usually worth the wait.

How to Play Double Diamond

The free Double Diamond slot above is ideal for testing the game settings and betting options. The layout is simplistic and easy to use, ensuring even beginners would feel comfortable.

  1. Set your wagering amount: options range from $1 to $250. You can adjust your bet using the “+” and “-” buttons at the bottom left of the desktop screen, which are always visible for easy access. Tap the green arrow to open the bet configuration menu on mobile devices and tablets or when playing in mini-game formats. You can modify your stake size and confirm your choice by clicking the green checkmark.
  2. Spinning the Reels: Press the yellow circular arrow button to spin the reels after setting your bet. Otherwise, there’s an auto-spin feature for a more relaxed session. This allows the game to spin the reels continuously for a set number of times.

Double Diamond Slot reels on mobile

The good thing about this slot is there’s no need to track multiple pay lines — Double Diamond features just one central horizontal pay line across three reels. This simplicity differentiates it from other IGT titles like the Cleopatra slot, which offers 20 pay lines and diverse winning combinations drawn from multiple directions.

Raymond van WykGambling Editor

“Due to the higher volatility, the single payline configuration is ideal since you're wagering on a single line instead of 10 or more as with other slots. It allows you to keep to your ideal bet per spin and increase the bet per line at the same time, meaning higher payouts for combinations.”

Double Diamond Symbols to Payouts

Symbol Payout
Any BAR 3 = 5 x stake
Cherries 1, 2 or 3 = 2, 5, 10 x stake
Single BAR (green) 3 = 10 x stake
Double BAR (pink) 3 = 25 x stake
Triple BAR (purple) 3 = 40 x stake
Red 7 3 = 80 x stake
Double Diamond Logo | Wild 3 = 1000 x stake
Matches any other symbol on the pay line

Note: For quick reference, you can view the payouts for each symbol by clicking on it directly from the game’s main screen. On desktop, click ‘Paytable’ in the upper right corner; tap the two blue arrows on mobile.

Double Diamond Bonus Rounds

While Double Diamond doesn’t boast many bonus features, its special symbols offer powerful potential. Amongst these are the:

Double Diamond Wins

The Double Diamond icon serves as the wild symbol and is the most valuable in the game. It can replace any other symbol to help create winning combinations.

Good to know: A Double Diamond symbol substitutes for a Cherry only if another reel displays a Cherry on the payline.
Landing three Double Diamond symbols on the payline grants the highest payout. Still, if you get only one or two, they act as wilds and can substitute for other symbols to form winning combinations and increase payouts.
  • One wild doubles the payout,
  • Two wilds quadruple it.

Double Diamond Slot big win on mobile

Any-Bar Wins

You can win with any combination of non-matching BAR symbols on the pay line. This feature increases the chances of securing payouts by allowing more flexible winning combinations.

Cherry Wins

Any combination that includes at least one Cherry symbol is a winning spin. Here’s how it works:

  • One-Cherry winner – Landing one Cherry guarantees a payout, no matter which reel it appears on.
  • Two-Cherry winner – If two Cherry symbols appear on the pay line, your win is multiplied by 5, no matter which two reels they land on.

Auto Spin Feature

The Auto Spin feature is prevalent in many modern titles, including popular ones like Siberian Storm Slot. It automates gameplay for a set number of spins, allowing you to sit back and watch the action unfold without manually spinning each time. Here’s how you can use it in Double Diamond:

  • After selecting your bet configuration, click on the auto spin function *
  • Choose the number of spins you want to play automatically. You can continue playing until you decide to stop, until your balance runs out, or any set win/loss limits are reached.

* To access it, click the blue button with a circular arrow and a plus sign. This button is designed to be easily recognizable and accessible on all devices. You can select from predefined numbers of spins, like 3, 5, 10, 15, or 20.

Features and Bonuses at a Glance

Features Double diamond wins, any-bar wins, cherry wins, auto spin
Bonus Payouts Yes
Jackpots No
Bonus Rounds No
Free Spins No
Multiplier Up to 4x
Scatter Symbol No
Wild Symbol Yes (Double Diamond icon)
Autoplay Yes
Gamble Feature No
Progressive Jackpot No

Double Diamond Review

Double Diamond encapsulates the nature of traditional slot machines with its straightforward play and minimalistic design. It feels like a refreshing break from the complex video slots that dominate today’s market, offering clean graphics and simple gameplay that’s easy to grasp.

The audio maintains the same simplistic tone, activating only during reel spins. Unlike games such as Triple 7, the absence of continuous background music could make the overall experience feel somewhat static and less engaging if you enjoy a more immersive sonic environment.

Looking at its volatility, the high level intensifies the excitement as each win could be a substantial payout.

Our Top 3 Reasons to Play the Double Diamond Slot Machine

Whether you’re new to slots or a seasoned player, here are three compelling reasons why you should give Double Diamond a spin:

  • Highly volatile rewards: Double Diamond’s high volatility is perfect if you love the rush of landing significant, albeit less frequent, wins.
  • Simple and classic design: With just a single payline, it harks back to traditional slot machines by offering straightforward gameplay without the complex features found in many modern titles. Its simplicity makes it easy to understand and enjoyable to play.
  • Free play: The Double Diamond slot game free play is available at the beginning of the review and at some of the best IGT casinos. This option allows for a feel of the game without any financial commitment. It’s an excellent way for beginners to practice.

Double Diamond Slot – Fairness and RTP

The high Double Diamond slot volatility will definitely suit you if chasing substantial, though less frequent, wins is your style of play. A return-to-player (RTP) rate of 95.44% is slightly below the typical benchmark of 96% but compensates with the potential for higher payouts.

Its design centres on the unique appeal and challenge of managing just one pay line. Each spin stands alone while upholding fair gaming practices, guaranteeing outcomes are not swayed by previous spins, your bet size, or any external factors.

Play at Mobile Casinos

You can seamlessly enjoy the real-money and free Double Diamond slot versions on mobile devices—including iOS, Android, and Windows—whether you access it through a browser or one of our recommended casino apps. It adapts well to smaller screens, offering high-quality graphics and smooth gameplay like its desktop counterpart.

The game is available vertically and horizontally; I prefer the latter. It makes the interface much more accessible and visually appealing.

Double Diamond maintains the same game features on mobile, such as the wild multipliers and the simple layout of the reels. All this, with the added advantage of playing on the go without compromising on the quality of the experience. I never experienced loading delays or lag myself.

Similar Online Slots

If you enjoy Double Diamond, you might also appreciate these similarly amusing IGT slots, each with their own unique features:

  • Triple Diamond builds on the format of Double Diamond, including its features, with the main difference in its nine pay lines.
  • The popular Cleopatra slot by IGT dives into ancient Egyptian glamor while combining iconic Cleopatra-themed graphics with modern features
  • Da Vinci Diamonds is famous for its tumbling reel feature and its touch of Renaissance art.

Does the Double Diamond Slot Machine Impress? – Our Verdict

As a fan of classic slots myself, I fully appreciate Double Diamond’s popularity. The 95.44% RTP may be somewhat disappointing if you’re accustomed to games with higher returns, but from the start, it’s clear and simple—the rules are easily accessible and straightforward.

While its high volatility might not suit everyone, the impressive 1000x multiplier can be exhilarating if you’re prepared for the potentially longer ride to the next win. The sound design, though basic, stays true to classic pub vibes, giving you that authentic slot machine feel every time the reels spin.

All in all, whether IGT’s slot becomes your go-to or just a nostalgic escape, it guarantees nothing less than an entertaining experience. Check out the Double Diamond slot machine free play mode and see for yourself!


How We Test and Review Online Slots

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The most attractive online slots have the biggest jackpots and special features. However, evaluating all aspects, including fairness and volatility, is essential.

At Techopedia, our in-house review process examines each aspect, ensuring unbiased and detailed slot reviews you can trust. 

This Includes:

  • Bonus features and special symbols
  • Symbol payouts and jackpots
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  • Game settings 
  • Software provider

…and more.

Read more about the detailed steps for testing and reviewing slots at Techopedia.

Double Diamond Online Slot FAQ

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What is the RTP of the Double Diamond Slot?

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What is the Double Diamond Slot’s volatility from IGT?

Affiliate Disclosure: Techopedia may receive advertising commissions for visits to a suggested operator through our affiliate links, at no added cost to you. However, all our recommendations are unbiased and follow a thorough review process. Gambling can be addictive, please play responsibly and you must be of legal gambling age.

Charlon Muscat
iGaming Expert
Charlon Muscat
iGaming Expert

Charlon is a freelance iGaming writer who began his career in Malta with PaddyPower. His contributions date back to 2019, focusing mainly on analyzing online casinos, sportsbooks, payment options, and the latest trends and strategies from the viewpoint of an actual player.