Undine’s Deep


This slot is not available to play due to UKGC’s new licence condition.

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Undine's Deep Overview

Undine’s Deep in UK developed by Endorphina Slots is water-themed slot machine which takes players to the depth of the ocean. Gamblers can dive in deep waters and play with mermaids while searching for gems. It has 5 reels, 3 rows, and 10 play lines. This casino game has a bluish water background, and all the symbols are inspired by the marine life. With serene graphics, vivid symbols, and moving music, players are welcome to explore the beauty beneath the surface.

How to Start Gambling

Players have to set their bets before visiting the mermaid city. With a coin-shaped button, they can change the coin value between 0.01 and 5. After setting the coin denomination, punters can change the number of lines and the number of coins bet per line. Once done with the bet, they should press the spin button to spin their reels. With the autoplay, gamblers can enjoy long play streaks without any breaks.

The RTP of the slot machine is 96.2%.

Benefit from Undine’s Deep in UK

The gameplay has multiple free spins, scatters, and wild symbols in the form of Goldfish. Besides, it comes with the gamble feature, but it doesn’t have a bonus game.

  • Free Spins. If 3 or more scatter symbols land on the reels, gamblers get 15 free spins with a 3x multiplier.
  • Gamble Game. After every win, the player gets a chance to double their win in the gamble round. Picking the higher card doubles the win, while picking a lower card makes them lose it all.

Being a beautifully crafted game, it is popular at many casinos online. Gamblers can enjoy betting with real money while the new players can enjoy playing the free slot online version. Try it now as its payouts are high, and gamblers can win the jackpot of 9,000 coins.

Online Casinos Where You Can Play Play at

Bonus amount
MYR1800 Welcome Bonus + 200 Free Spins
Go To Casino
New eligible UK players only. Select Casino offer on sign-up. Spins must be claimed on ‘’My Offers’’ page within 14 days of sign-up. Spins for Book of Dead game only and have a £0.10 value each; expire 7 days from claim. 35x wagering on eligible slots before winnings are converted to cash. Play Responsibly. 18+ begambleaware.org. Click for full T&C’s.

Undine's Deep Video Review


More Endorphina Free slots


Percy Austin
May 5, 2019

I was pretty disappointed with the Superman slot I tried recently, but this game looked much better at first glance - I liked the comic book style of the games symbols and the characters are all really well drawn too. It's great to see so many characters adorning the reels and I can imagine this game could appeal to a large number of players, especially those who play Playtech's Marvel slots but have become a little bored waiting for a new game of late. Things started off a little badly though, I got two five of a kinds of character symbols very early on into my play which awarded just 1x and 3x my stake, and checking the paytable it seems 10x your stake is the most you can hope for from a five of a kind hit on this game. I was sure the game would have some big win potential somewhere but didn't want to sit and read through the paytable and rules in depth just yet, so kept on spinning hoping for something amazing from the features.It took me a couple of hundred spins but I finally caught three bonus symbols on the centremost reels, which awarded ten free spins. The game promises additional random wilds during the free spins anad they certainly appear more often than during the base game, although it still seems a little stingy to me. The game awards extra free games randomly as well which is a bit of a cop out - okay I guess it's no different than being awarded them by random stops of the reels, but it still feels a bit cheap to me.The Super Hero spins are clearly what it's all about though, you need to collect wilds during the regular free spins to increase the number of these special spins you receive with locked stacked character symols on reels 1 and 5. Any win containing a wild in these spins is awarded a random multiplier up to 10x, and once again you can collect extra Super Hero spins during this mode as well. All of this means the feature can take quite a while to play out, which feels nice until it finishes without a substantial win - out of five features I only had a win over 100x my stake once despite all the bells and whistles going on, and the feature doesn't feel all that easy to get either.


I declare that my review is based on my own experience and represents my genuine opinion of this slot.