Mermaid Pays 100 lines

Mermaid Pays 100 Lines Slot Logo Slots UK

Mermaid Pays 100 Lines is an underwater-themed online slot game developed by Atomic Slot Lab. With a Return to Player (RTP) rate of 93.99%, a minimum bet of £0.50, and a maximum bet of £5.00, this slot may appeal to beginner and seasoned players alike. It is available to play here at Slots UK after creating an account with us.

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Mermaid Pays 100 Lines Slot Game Overview

The Mermaid Pays 100 Lines slot game is set underwater on a reef with stone ruins. It plays out across a 5x4 grid, and - as the name suggests - it has 100 paylines.

Symbols you may come across on the reels include various aquatic life forms, including sting rays, dolphins, octopuses and fish of various colours.

There are also bonus features you could potentially trigger in the course of playing this slot game, including a Free Spins feature and a Mystery Replacement feature.

How To Play Mermaid Pays 100 Lines

To start playing Mermaid Pays 100 Lines, players need to set their bet amount. The bet amount can be adjusted using the plus and minus buttons next to the bet amount or by selecting the bet amount directly. Betting options range from a minimum bet of £0.50 and a maximum bet of £5.00 per spin.

Once the bet amount is set, players can press the spin button to start the game. The reels spin and then stop displaying a random selection of symbols. The round ends if there are no wins or after the awarding of payouts if there are wins.

Mermaid Pays 100 Lines follows basic slot game rules. The game features 5 reels and 100 paylines, with wins forming by landing at least 3 identical symbols from left to right on one of the paylines, starting from the leftmost reel. 

Features & Symbols

Mermaid Pays 100 Lines offers several exciting features and symbols that enhance the gameplay experience. 

Wild Symbol

The wild symbol, represented by the golden dolphin, can substitute for all symbols except the scatter symbol.

Mystery Replacement Feature

One of the unique features of this game is the Mystery Replacement. At the start of each game, symbols on the reel strips can change into one of the regular paytable symbols. All changed symbol positions on all reels change into the same symbol.

Free Spins Feature

One of the main features is the Free Spins feature, which is triggered by landing 3 scatter symbols anywhere on the reels. This awards 10 Free Spins. 

During the Free Spins, the mermaid symbol becomes wild and can substitute for all symbols except the scatter symbol and golden dolphin wild. Each game win is repeated by the number of mermaid symbols appearing in the window on that game.

Additionally, landing 2 or 3 scatter symbols during the Free Spins awards players with 3 or 10 additional Free Spins, respectively. 

The Mystery Replacement feature is also active during Free Spins.

Paylines & Ways to Win

Mermaid Pays 100 Lines offers 100 paylines, providing players with numerous ways to land winning combinations. The game features various symbols, each with their own payout values. The mermaid symbol offers the highest payout of up to 5x your stake for landing 5 along a payline.

It's important to note that only the highest line win is paid on each active payline, and scatter wins are paid in addition to line wins. 


Mermaid Pays 100 Lines is a fairly simple online slot game with limited animations, but it is well-designed with intricate symbols, and the theme is interesting with its underwater world filled with mystical creatures. It also has exciting bonus features like the Mystery Replacement and Free Spins, further adding to the gameplay. 

Create an account here at Slots UK to play the Mermaid Pays 100 Lines slot game, or you can check out the rest of our collection, which contains other great slot games as well as online and live casino games.

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*All values (Bet Levels, Maximum Wins etc.) mentioned in relation to this slot game are subject to change at any time. Game features mentioned may not be available in some jurisdictions.