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Undine’s Deep

RTP 96%
Play Endorphina Slots
Reels 5
Paylines 10
Min bet size
Max bet size
RTP 96
Wild symbols Yes
Free spins Yes
Bonus Yes

Top Casinos: United Kingdom

Undine’s Deep Slot Review

The Undine’s Deep slots game can be found at casinos offering Endorphina software. Endorphina are one of the newer casino software providers on the market but they have managed to gain distribution with some of the largest casino networks currently active within the market. As a standard Endorphina do publish the RTP/House Edge information for their slots games within the game help file or paytables. As a software provider not licensed in the UK, and as such not required to publish this information, this is a significantly player friendly practice. As such we can state that the Undine’s Deep House Edge is 4.00%.

Undine’s Deep is a 5 reel slots game and each reel is 3 symbols high. The game uses 10 paylines and you can bet up to 10 coins per payline.

Special Symbols

Wild – The “Goldfish” is the Wild symbol, replacing all symbols except Scatters and multiplying wins by 2. The “Goldfish” symbol is also the most valuable in the game. 2 “Goldfish” symbols in a winning combination will award you with 10 coins, 3 will award you 250 coins,4 will award you with 2500 coins and 5 “Goldfish” symbols in a winning combination will award you with 9000 coins.

Scatter – The Scatter symbol is the “Mermaid”, which will trigger the game’s bonus feature.

Bonus Features

Take Risk – Whilst you might not necessarily class this as a bonus feature, it does play a significant role in the gaming experience. With every win you get the chance to try and double your win by trying your luck in a game of “Play Your Cards Right” with the game’s dealer. If you can flip over a card that is higher than the one the dealer is showing you will double your win. Flip a card that is lower than the dealer’s and you lose the lot. This round continues until you either choose to stop gambling or you lose out to the dealer. In the result of a tie, no one wins.

Free Spins – You will trigger the game’s free spin bonus when you land three or more of the “Mermaid” Scatter symbols anywhere on the reels. When this happens you will be awarded 15 free spins. During the feature all wins are multiplied by 3. Free Spins can also be re-triggered, playing at the original bet value.


Undine’s Deep takes the player to the bottom of the seabed where you are submerged in a world of mermaids, goldfish, seahorses and sea urchins. The game takes its name from a series of Roman myths about elemental beings who lack souls and try to fill that void by marrying a male mortal. This game is really just about the sea, with a few mermaids thrown in for good measure. The symbols and the game’s background look OK, but there’s nothing here to really inspire. The bonuses are also relatively standard, offering little in terms of engaging game play. There are free spins, wilds and a gamble option but other than that, there’s not much going on. The house edge is a predictable 4%, keeping “Undine’s Deep” in line with most of Endorphina’s back catalogue. If it’s mermaids you’re after, there are many games out there that will offer you a more immersive and more detailed game than this.

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Top Casinos: United Kingdom

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The United Kingdom of Great Britain and Northern Ireland sits to the north-west of mainland Europe. The United Kingdom shares a border with The Republic of Ireland and has coasts on the Atlantic Ocean, Celtic Sea, North Sea, Irish Sea and English Channel. The population of the UK is approaching the 67.6 million mark leading to a fairly densely populated land mass. The gambling sector in the United Kingdom is entirely regulated and licensed by the UKGC – the United Kingdom Gambling Commission. Should players resident In the UK wish to gamble with foreign based operators there is no history of this being treated as a criminal offence, but high levels of protection exist for UK residents playing with UK licensed operators.


The above information is what we believe to be the the legal status of online gambling, however information on this topic is limited and hard to find. We accept no liability for any errors or ommissions. It is the reader’s responsibility to ensure that they know the legality of online gambling in their country before engaging with any online gambling service.