Submariner Slot Review, RTP & Free Demo

Submariner slot by KA Gaming

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Submariner Overview

Submariner is an underwater video slot from KA Gaming, released on 24 July 2024. It plays on a grid of six reels and five rows, and instead of paylines it pays for groups of matching symbols, with winning symbols clearing away so new ones can drop in. Bets run from $0.25 to $125 per spin.

KA Gaming has not published an RTP, a volatility rating or a maximum win for Submariner, and SlotCatalog lists all three as unavailable, so we leave those figures out rather than guess. The numbers below come from our own demo session, played at the maximum bet of $125.

A Bright Coral Reef

The grid floats in clear blue water with sunlight falling through from above, coral and sea grass on both sides and small fish drifting in the background. A green frame holds the reels, and a label on each side reads 5X6 CLUSTERS.

The symbols are all sea creatures drawn in a cheerful cartoon style: an orange clownfish, a red shrimp, a green crab, a purple clam with a pearl, an orange starfish, a glowing blue jellyfish, a pink seahorse, a blue coral branch and a green strand of seaweed. The scatter is a young sea hero with orange hair and a golden trident.

How the Wins Are Counted

The paytable is printed in dollars for the current bet, and it pays by the number of matching symbols on the grid in three bands: 8–9, 10–11 and 12 or more. At $125 the values are:

Clownfish – $1,000 / $2,500 / $5,000 (8x, 20x and 40x the bet)
Shrimp – $250 / $1,000 / $2,500 (2x, 8x and 20x)
Crab – $200 / $500 / $1,500 (up to 12x)
Clam – $150 / $200 / $1,200 (up to 9.6x)
Starfish – $100 / $150 / $1,000 (up to 8x)
Jellyfish – $80 / $120 / $800 (up to 6.4x)
Seahorse – $50 / $100 / $500, coral – $40 / $90 / $400, seaweed – $25 / $75 / $200

Groups of fewer than eight symbols do not pay at all, so a crowded grid of mixed creatures can end with nothing, while a single creature that spreads across the reels pays wherever its symbols sit.

The biggest jump in every row comes at twelve symbols. A group of 12 clownfish pays five times as much as a group of 8–9, so the game rewards grids that keep filling with the same creature.

The Scatter and the Free Games

The sea hero pays on his own, wherever he lands: 4 scatters pay $375 (3x), 5 pay $625 (5x) and 6 pay $2,500 (20x). In our session four of them landed across the grid, the spin paid $375 and the game announced “YOU WON 10 FREE GAMES” between two golden clam shells, with the free games starting automatically after a short countdown.

SlotCatalog lists additional free spins and a free spin multiplier among the game’s features. We did not capture a retrigger or the multiplier on screen, so we describe them only as listed features.

Symbols That Clear Away

When a group pays, its symbols disappear and new ones fall into the gaps, and a single spin can keep paying through several drops. One of our spins ended with “TOTAL WIN FOR SPIN $300.00” – 2.4x the bet – after clownfish, shrimp and crabs had cleared from the grid.

In another sequence the counter at the bottom climbed step by step. A group of purple clams paid $150 with the total at $200, then a group of seaweed added $25 with the total at $425. Every small group counts, and the drops give each spin more than one chance to connect.

The Best Moment of the Session

Our strongest capture showed eight glowing jellyfish spread across the grid, paying $80 for the group, while the win counter stood at $2,627.55 – just over 21x the bet. The odd cents in that total suggest that a multiplier was at work at that point, which fits the free spin multiplier listed for the game, but the capture does not show the multiplier itself.

What to Expect

Most groups in Submariner are made of the lower creatures, and at 8–9 symbols they return less than the stake – the seaweed pays only 0.2x and the jellyfish 0.64x. The real value lies in the top rows at twelve symbols and in the free games, where the drops keep running without costing another bet.

Without a published RTP or maximum win, the paytable is the most reliable guide: 40x for twelve clownfish and 20x for six scatters are the largest single figures on it.

Who Should Play It

Submariner suits players who like count-based slots with falling symbols and a light, colourful theme. The three payout bands are easy to follow, and the $0.25 minimum makes it cheap to explore in the free demo above before playing for real money.