Undine’s Deep by Endorphina
Dive into a mystical ocean world where mermaids, sea creatures, Wilds, and Free Games create a calm but high-reward slot experience.
96.10%
RTP
50
Lines
5x4
Reels and Rows
0.5 - 200 EUR
Bet Range
0.5 - 200 EUR
Bet Range
0.5 - 200 EUR
Bet Range
Undine's Deep is a mythic underwater slot set in a peaceful ocean scene with crystal-clear water, slow-moving seagrass, seahorses, and a mermaid heroine at the center of the story. The game uses a 5x3 layout with 10 lines, runs on mobile devices, and is built for regulated markets. Endorphina lists it with a 96.07% RTP, high volatility, and a bet range from 0.1 EUR to 90 EUR. Its core mechanics include Wild, Scatter, Bonus Pop, Risk Game, In-Game Free Spins, and multiplier features, giving the game a bonus-heavy structure beneath its soothing theme.
How to Play Undine's Deep?
Undine's Deep is easy to learn, with clear symbol rules and bonus triggers that make each spin easy to follow.
1. Set Your Bet
Choose a stake between 0.1 EUR and 90 EUR before spinning the reels.
2. Spin the Reels
Launch the 5x3 grid and look for matching symbols across the 10 lines.
3. Watch for Scatter Symbols
Three or more mermaid Scatters trigger 15 Free Games, while two Scatters can already pay.
4. Chase Wild Wins
The golden fish Wild helps complete combinations and doubles wins when it substitutes into a paying line.
5. Decide on the Risk Game
After a win, choose whether to cash out or gamble the payout for a higher return.
Start Undine’s Deep on Twinqo to see how its bonus features activate during standard reel play.
FAQs
What is Undine's Deep?
Undine's Deep is an underwater themed slot by Endorphina with a 5x3 layout, 10 lines, Wilds, Scatters, Free Games, and other bonus features.
What is the RTP of Undine's Deep?
The official RTP listed on Endorphina's page is 96.07%.
What is the volatility of Undine's Deep?
The game has high volatility, so bigger feature-driven wins are more likely than frequent small payouts.
How many lines does the game have?
Undine's Deep uses 10 lines on a 5x3 reel layout.
How do Free Games work?
Landing 3 Scatters triggers 15 Free Games, and all prizes in that round are multiplied by x3.
What does the Wild do?
The golden fish Wild substitutes for all symbols except Scatter and doubles the win when it completes a winning combination.
What is the highest Wild payout?
Five Wild symbols pay 900x the base bet.
Can Free Games be won again?
Yes, the official page says Free Games can be won again during the feature.
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Game Features
Undine's Deep combines classic reel play with ocean-themed bonus mechanics that can turn a quiet spin into a much bigger round.
Wild
The golden fish acts as the Wild, substituting for all symbols except Scatter. When it substitutes in a win, it doubles the win, and five Wilds pay 900x the base bet.
Scatter
The mermaid symbol is the Scatter. Two Scatters already pay on the paytable, while three or more trigger Free Games, making it one of the most important symbols in the game.
Free Games Bonus
Landing 3 Scatters awards 15 Free Games, and all prizes during the feature are multiplied by x3. Free Games can also be won again during the bonus round, which gives the feature extra staying power.
Top Paying Symbols
The starfish and sea urchin are the highest paying regular symbols. A five-of-a-kind win with either symbol awards 75x the base bet, making them strong base game targets.
Risk Game Option
The Risk Game lets players gamble a win for a chance at a bigger payout instead of collecting immediately. It adds a classic Endorphina tension point after successful spins.
