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Pragmatic Play’s Kingdom of Atlantis is one of those slots that just makes you scratch your head. It uses the familiar pay-anywhere tumble mechanics we all know and love, but they decided to bolt a progressive jackpot onto it, and man, do we pay the price for it.
Moon Rush runs this exact same board at a solid 96.50%, with the very same 5,000x maximum. Fury of Anubis uses the same mechanics, returns 96.52% and lets you win 10,000x. But here? The RTP tanks to 94.50% and the max win is capped at 5,000x. Why? Because of the jackpot. But as you’ll see, how this jackpot actually works is basically a joke.
The Base Game Grind (and Wasted Multipliers)
You need 8 matching symbols anywhere on the 30-space grid to get a win, which triggers a tumble. Pretty standard. But the paytable is weirdly flat. For example, if you get 12 tridents, you win 50x your bet. If you get incredibly lucky and all 30 spaces fill with tridents? It still only pays 50x. There is absolutely zero extra reward for getting a huge cluster.
The base game is a harsh grind. I had stretches of a dozen dead spins in a row. Multiplier gems (from 2x up to 500x) can drop, but they only apply if you actually get a winning combo on that specific tumble. At one point, a sweet 6x multiplier dropped onto my board… and just sat there as useless decoration because the spin was a dud.
The Sneaky Ante Bet Penalty
To get into the free spins, you need 4 Poseidon scatters. You can buy the bonus outright for 100x your stake, or turn on the Ante Bet (paying 25% extra per spin) to double your chances of triggering it naturally.
But here is where the game pulls a fast one on you. If you turn on the Ante Bet, the game quietly lowers your max potential win from 5,000x down to 4,000x. You are literally paying extra for a better shot at the bonus, and the game secretly shaves 20% off your top prize without warning you anywhere on the main board. That feels genuinely unfair.
Free Spins: A Stressful Waiting Game
During the free spins, your multiplier doesn’t reset. It keeps growing, but only when a gem lands on a winning spin. Because of this, the bonus round is heavily back-loaded, meaning all the real money is made at the very end.
I bought the bonus twice. Both times, the first 10 spins barely did anything, and the meter was still in single digits. One round was a total bust until a lucky hit on the very last spin saved it from being a total disaster. The other round caught a late retrigger and paid out huge, with over half my profit coming from a single drop right at the end. I walked away in the green, but the game labels itself as “medium volatility.” Yeah, right. It plays a lot rougher than that.
The Biggest Problem: The Jackpot Makes No Sense
Here’s the craziest part of the whole game. The entire reason this slot has a terrible 94.50% RTP is to fund the four-tier progressive jackpot. Yet, the jackpot can only trigger at the end of a base-game spin.
The moment you pay 100x to buy the free spins, which is the only place the multiplier meter actually builds and the game gets fun, the jackpot is completely turned off.
Other games (like Tiki Hut Megaways) prove you can have a progressive jackpot without absolutely destroying the RTP. But Kingdom of Atlantis is just a mess of contradictions. It’s a beautifully designed game ruined by its own math. You’re paying a hefty RTP tax for a jackpot you can’t even win during the bonus, and paying an Ante bet fee that secretly nerfs your max win.
Save your money and just go play Moon Rush instead.
