Queen of Sirens

Queen of Sirens Slot Review

Shafts of light fall through deep blue water onto a drowned temple, a red-haired mermaid watching the reels from one side and a glowing clam shedding bubbles from the other. It’s a beautiful place for Queen of Sirens, an Evoplay game that refuses to pay you anything until its bonus round arrives, and that single decision shapes every spin on the three-by-three board more than any of its coin symbols do.

What’s unusual here is that none of the symbols pay in the ordinary way. Everything runs through the bonus rounds, which makes the base game a slow build towards something bigger. It’s a 3×3 grid running at 95.98% RTP with high volatility, and it sits in the same compact-reel territory as 3 Flaming Clovers and Hot Triple Sevens. Whether that build pays off is what the rest of this comes down to.

The Base Game and Its Coin Symbols

There are no paylines and no conventional wins at all. Queen of Sirens is a three reel, three row game where all symbols pay only in the Bonus Game or Ultra Bonus Game. A combination of any three symbols on the central line is what triggers those rounds.

Instead of paying spin by spin, the reels accumulate value. Coins land carrying bet multiples, some of them stick, and the whole board settles up only when a bonus round finally arrives. Everything the base game does is a version of that one idea:

• Any 3 symbols on the central line trigger the Bonus Game or Ultra Bonus Game
• Bonus Coin: x1, x2, x3 or x4 times bet
• Sticky Coin: x5, x6, x7, x8 or x9 times bet
• Sticky Coin holds on the reels until a bonus round begins
• Changing the bet removes the Sticky Coin from the reels
• The Octopus collects all Bonus symbol values and jackpots that landed before it
• Mystic Jackpot is guaranteed to hold the Mini, Minor or Major

Bonus Coin

The Bonus Coin appears in the main game and both bonus rounds, and it’s the workhorse of the whole design. Each one carries a random value in multiples of the bet, and that value shows in your selected currency on the reel.

Those values only actually pay once a bonus round collects them. A reel full of coins in the main game is worth nothing on its own; it’s a promise the bonus has to redeem.

Sticky Coin

The Sticky Coin is the base game’s hook. It lands in the main game and stays on the reels until a Bonus Game or Ultra Bonus Game begins, carrying values from x5 up to x9 the bet, comfortably above the ordinary Bonus Coin.

There’s a sting attached: changing your bet removes it from the reels entirely, so a sticky coin pins you to your current stake until a bonus arrives. How long you’re willing to sit still becomes part of the game.

The Octopus

The Octopus carries no value of its own. In the main game it’s one of the activators of the bonus round. When it lands during a Bonus Game or Ultra Bonus Game, it gathers up every value and jackpot from the Bonus symbols that arrived before it into one payout.

An octopus at the right moment can sweep an entire board of coins into a single total, so a late one landing after a run of high-value coins is the moment the round pays for itself.

The Bonus Game

Land any three symbols across the central line and the Bonus Game begins. All the Bonus symbols involved in the trigger stay locked in their positions for the duration, and the round starts with three spins.

Every time a new Bonus symbol lands, the spin counter resets back to three. The round runs until the spins run out or all nine positions on the reels fill with Bonus symbols, whichever comes first.

When it ends, the value of every Bonus symbol on the board is added together and paid as one total. The round plays at the same bet as the spin that triggered it.

Mystic Symbols

Mystic symbols resolve at the end of the round, turning into any other symbol except the Sticky Coin. The Mystic Jackpot version is guaranteed to contain one of three jackpots: Mini, Minor or Major.

It’s the one symbol that keeps a late landing interesting, because its value isn’t fixed until the round closes. A Mystic arriving on the final spin can still change what the board is worth.

The Jackpot Ladder

Four fixed jackpots can be won during the Bonus Game, and the ladder is steep at the top. The GRAND sits a full ten times above the next step, which makes it the whole shape of the ladder in one number:

• GRAND: 500x the bet
• MAJOR: 50x the bet
• MINOR: 20x the bet
• MINI: 10x the bet

Ultra Bonus Game and Luck of Aurora

The Ultra Bonus Game can activate randomly on any round of the main game, no central line required. Before it starts, three or more random symbols are placed on cells filling the central line, so the round opens with a head start that the ordinary Bonus Game doesn’t get.

Luck of Aurora is always switched on at the beginning of the Ultra Bonus Game, and triggers more often there than in the standard round. It can also activate randomly during either bonus game.

When it fires, Luck of Aurora shoots between one and nine fire comets into random cells, leaving a x2 multiplier on each one. A comet landing on a cell that already carries a multiplier increases that cell’s multiplier by one.

The multipliers hold until the round ends, and each symbol’s winnings are multiplied by its cell’s multiplier at the end. Stacked comets on a single cell are where the big totals come from.

Bonus Buy

A bonus buy button sits alongside the reels, so you can skip the build and go straight into the feature. Given that the base game only accumulates value rather than paying it, the buy is doing honest work here rather than offering a shortcut around a working base game.

Our Honest Verdict

Overall Rating: 7/10

Playing Queen of Sirens is mostly waiting, and it’s honest about that: the entire game is bait on a hook, coins piling up on a sunken temple while you sit still for the round that finally pays. The one reason to choose it is that when the round comes, it resolves everything at once, and that single settling moment is worth the patience.

The Ultra Bonus Game is the best thing here, because starting with symbols already on the board and Aurora’s comets flying from the first spin turns a build into a payout almost immediately. The floor is the problem: below the GRAND, the jackpots are small change, so most rounds that don’t hit the top rung feel thin.

This is a game for players who enjoy the long accumulation and one big reveal, not for anyone who wants a win every few spins. Below the surface there’s a genuinely good hold-and-collect round; it just takes a while to reach it.

Queen of Sirens FAQs

• What is the RTP of Queen of Sirens?

  The RTP is 95.98%.
• Is Queen of Sirens high volatility?

  Yes, Queen of Sirens is a high volatility game.
• How do wins work if there are no paylines?

  Queen of Sirens has no traditional paylines. All symbols are paid only in the Bonus Game or Ultra Bonus Game, and a combination of any 3 symbols on the central line triggers those rounds.
• What is the grid size of Queen of Sirens?

  Queen of Sirens is a 3 reel, 3 row video slot, so a 3×3 grid with nine positions in total.
• Can you buy the bonus on Queen of Sirens?

  Yes, a bonus buy button sits in the game, letting you skip the base game build and go straight into the feature.
• When is Queen of Sirens released?

  Queen of Sirens’ release date is 12 June 2025.
• Who makes Queen of Sirens?

  Queen of Sirens is made by Evoplay.
• Does the Bonus Game retrigger?

  In a sense, yes. The Bonus Game and Ultra Bonus Game always start with 3 spins, and each time a new Bonus symbol lands, the spin count resets back to 3. The round continues until the spins finish or all 9 positions fill with Bonus symbols.
• What does the Octopus symbol do?

  It’s one of the activators of the bonus round in the main game. Inside a bonus round it hoovers up the values and jackpots of every Bonus symbol that landed before it.