King of Atlantis Slot Review

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Based on ancient Greek mythology, King of Atlantis transports you to the seas ruled by Poseidon. Created by IGT in 2017, this slot has 40 fixed paylines, a 94.10% RTP and low volatility, so we expect a decent stream of small wins. Nonetheless, in-game features like the Gigantic Wilds and Poseidon Free Spins Bonus should give higher wins.

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King of Atlantis

Game Developer:

International Games Technology (IGT)

Release Date:



5 x 5







Minimum / Maximum Bet: 

40/19,500 in-game credits

Maximum Win: 


Bonus Features:

Gigantic Wilds, Poseidon Free Spins Bonus

Slot Features

Gigantic Wilds

Poseidon is the game’s Wild and in this game you can choose how many you want on your reels. This replaces other in-game symbols except for the Scatter on the 2nd and 4th reels. 


Increasing the Wild count boosted our winning chances. After using the 20 Wilds alternatives without getting any wins, we switched to the 40 and 60 Wilds options. These changes got us wins worth hundreds of in-game credits. However, our big break came with the 40 Wilds selection, as we earned 650 credits on a lucky spin!


Poseidon Free Spins Bonus

During the Poseidon Free Spins Bonus round, the Wild Icons that activated the feature will remain in place till you exhaust the awarded Free Spins. Although this sets you up for a huge payout (if all reels turn Wild), there’s a drawback to this bonus round — Free Spins can’t be retriggered.

King of Atlantis Slot Verdict

From our experience, the key to earning massive wins lies in increasing the Wild count to 40 or 60 to earn multiple high-value wins. Although we couldn’t activate the Free Spins round, we made satisfying wins — all thanks to the game’s Gigantic Wilds.

Despite getting most things right, the fact that this slot doesn’t feature an  Autoplay function made playing a bit inconvenient. But, if you can ignore this subtle drawback, we’re sure you’ll enjoy the rest!

Similar Slots to King of Atlantis

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Queen of Atlantis

Queen of Atlantis was released by Pragmatic Play in 2017 and has a 5×4 layout with 1,024 betways. This game’s 96.41% RTP is slightly higher than what you’ll find on IGT’s King of Atlantis.

Bonus-wise, Queen of Atlantis blows King of Atlantis out of the water with Free Spins and Super Free Spins. We earned over €300 with these rounds — the fact that they can be re-triggered is also a massive plus. Regarding payouts, Queen of Atlantis falls behind with a 27x maximum payout.


Undine’s Deep

Endorphina released Undine’s Deep back in 2014. This game has a 5×3 layout and 10 paylines. Furthermore, its RTP (96%) exceeds the values on King of Atlantis. 

Undine’s Deep has more bonuses than King of Atlantis, edging the latter with a Risk Game (Gamble) and Free Games with a 3x multiplier. Endorphina’s Undine’s Deep also comes out on top with a maximum payout worth 7,500x your bet.