3 Coin Volcanoes

3 Coin Volcanoes Review

3 Coin Volcanoes is an online slot released by 3 Oaks Gaming in November 2024 as an offshoot of Coin Volcano from 2023. The game comes with an extended grid, a bag full of new symbols, and an enhanced Bonus Game. Players can choose the active lines and buy their way to the minigame. If you like lava, volcanoes, and hot prizes, stay with my dedicated review!

3 Oaks is a trending slot provider established in 2021 and shortlisted several times at major iGaming events. The parent company is incorporated in the Isle of Man, but it holds several major licenses. Moreover, 3 Oaks is certified for fairness of slot results by several auditors, including eCogra, GA, and RiskCherry. The provider maintains a solid portfolio of 140+ games and releases new titles steadily.

3 Coin Volcanoes is created as a joint venture between the studio and Kendoo Games, according to the loading screen when you start the game. It is a continuation of Coin Volcano, but not a sequel, which came in July 2025 - Coin Volcano 2. The slot in focus today is meant to exploit the original games popularity by following a different concept.

3 Coin Volcanoes comes with 4 reels and 3 rows, and players can activate 1, 2, or 3 horizontal paylines. Each one requires a bet, but they double and triple the chance of activating the Bonus Game, respectively. The minigame is enhanced with a Reelset Changing mechanic, multipliers, and an extra life, and you can play with 1, 2, or all features combined. You can test all of them for free right away via the 3 Coin Volcanoes demo.

3 Coin Volcanoes Slot - Reels Screen

3 Coin Volcanoes lacks regular symbols and pays no cash during the base game stage. The play starts with picking a bet from 21 options between €0.10 and €55. Next, select the number of active lines - 1, 2, or 3. As I already mentioned, each active line adds to the bet, so if you choose 3 paylines (recommended), the total bet will be from €0.30 and €165 per spin.

Sticky Coins are sticky symbols, and they are held on the grid for the start of the Bonus Game. However, if you change the bet, they will be removed and will not be saved for the previous stake level! Fire Marks may appear as overlay symbols and will be collected by the respective pots on top of the grid. The Symbols Collection mechanic is colorwise: green for Life, red for Multi, and blue for Grow.

The 3 Coin Volcanoes RTP rate is undisclosed by 3 Oaks, and there is no solid information on the web. Online sources come with different rates, and the most repeatable one is 95.68%. I’m keen to agree with it after testing the slot and given the Coin Volcano rate of 95.66%. The 3 Coin Volcanoes max win is uncertain, but the top hit is 2,000x the bet. The slot is characterized by medium levels of volatility!

3 Coin Volcanoes Features

3 Coin Volcanoes saves the best for the bonus stage, where all symbols show how valuable they actually are. Players can trigger the minigame with one, two, or three active features and get boosts throughout the respins. 3 Oaks has added several options for those willing to skip waiting, but first the basics:

Special Coins

Coins activate only during the Hit the Bonus minigame! Sticky Coins carry cash prizes in the range from 5x to 9x the bet, while Coin Prizes carry values from 0.20x to 4x. Jackpot Coins are Mini, Minor, and Major, while Grand and Royal come with additional rules. The first 3 can be won multiple times, while the other 2 only once.

Mystery Symbol and Mystery Jackpot reveal their values at the end of the bonus game. The first one can reveal any symbol but Sticky Coin, while the second one only a Mini, Minor, or Major jackpot. Coin Collect accumulates the values of all Coins and Jackpots in view upon landing. This will be done after any potential multipliers boost the cash values.

Bonus Game

Hit the Bonus is a Hold & Win type of minigame and starts when 4 symbols cover at least one active line. Symbols can be different and of any kind! Fire Marks contribute to the respective volcanoes and can also trigger the bonus upon collection. Here is what the features do if active during the minigame:

• Life Volcano - 1 guaranteed Respins Meter refill.
• Multi Volcano - adds 1 to 8 multipliers of x2 on random positions throughout respins. Multipliers hitting the same cells increase the multiplier by +1. The Eruption Feature will hit at least once during the bonus.
• Grow Volcano - 2 extra rows are added for a grid of 4x5. Royal Jackpot comes into play with this feature.

Hit the Bonus provides 3 respins and every new symbol resets the Meter. If you run out of respins and the Life Volcano is inactive, the bonus ends. Below, you can see all the jackpot prizes, but Royal Jackpot is only available with Grow Volcano active. You can win it by covering all 20 positions. If you cover all 12 positions during the bonus with Grow Volcano inactive, you’ll win the Grand Jackpot.

• Royal Jackpot - 2,000x the bet
• Grand Jackpot - 500x the bet
• Major Jackpot - 50x the bet
• Minor Jackpot - 20x the bet
• Mini Jackpot - 10x the bet

3 Coin Volcanoes Slot – Bonus Game Win Screen

Buy Bonus

Buy Bonus is your shortcut to the Hit the Bonus minigame, and 3 Oaks has added 3 options to choose from. Keep in mind that the feature may be disabled by some online casino operators. Moreover, it can be prohibited in your region, so you'd better check this in advance. If available, Buy Bonus provides:

• Random Bonus - 40x the bet - start the bonus with 1, 2, or 3 features.
• Bonus Trio - 75x the bet - start the bonus with all 3 features.
• Multi Madness - 300x the bet - start the bonus with all 3 features and get Eruption Feature on every respin.

Theme & Graphics

3 Coin Volcanoes presents a vibrant setting where the fire reigns, but there are different types of it. The one-color background underlines the retro vibe of the game, although this is no retro slot. Purple goes into red during the bonus, and all the animation effects enhance the Fire theme.

3 Oaks has selected an enthralling audio set that is also good for those seeking relaxation. 3 Coin Volcanoes is an HTML5 slot game that will fit your PC and mobile devices. It boasts premium-class graphics and is playable via all major browsers. Don’t forget to explore the technical features, including the Turbo Mode.

3 Coin Volcanoes Free Play

The 3 Coin Volcanoes free play version is available on SlotCatalog, and you can take advantage of it anytime. The demo is completely free and requires no registration or subscription. You can use all the technical and bonus features to practice and decide on your real money strategy. SlotCatalog is home to 45,000+ free casino games!

Pros And Cons Of 3 Coin Volcanoes Slot

Our Verdict

3 Coin Volcanoes is an appealing online slot that can be very fast-paced as well. It offers premium entertainment via a proven formula with a pot collection and combinable features during the bonus. At first glance, the only major weakness is the unknown RTP rate. However, I can also underline a couple of flaws.

At first, I’m disappointed by the lack of Sticky Coin saves per bet level. They will be completely lost if you change the wager and that forces players to abandon strategies. At the same time, the Coin Collect power is limited, and the symbol can’t collect the values of previous Coin Collect symbols. These might look light, but the competition in the category is severe!

Earlier in 2025, the industry leader IGT released Triple Cash Eruption, stepping up powerfully in the genre field. Treasures of Kilauea 2, the long-anticipated sequel, was also presented this year by PearFiction. And if those magnificent slots are not enough, I can recommend 3 Blazing Volcanoes. This game by Infinity Dragon Studios offers solid gameplay, awesome maths and stats, and 3 brilliant features.

All in all, 3 Coin Volcanoes can only rely on its non-standard gameplay to attract players. The lack of base game payouts is actually an advantage since it is speeding up the pace and removes the fluff. My test of the slot showed that the bonus is not too difficult to trigger, but I might just have had a good day. Make a spin on your own and see whether the slot draws you in!