| Provider | NetEnt |
|---|---|
| RTP | 97.07% - Compare RTPs |
| Volatility | Low-Medium |
| Reels | 5 |
| Hit Frequency | 23.00% |
| Features | Wilds, Bonus Rounds |
Secrets of Atlantis is a 5-reel, 4-row slot from NetEnt, played across 40 fixed paylines. Released in 2016, it puts you in an underwater world built around the mythical city of Atlantis - transparent reels, glowing jewels, and a soundtrack that sits comfortably in the background. What sets it apart from most slots in NetEnt's catalogue is the combination of Nudge Wilds, Colossal Symbols, and the Highlight feature, all without a traditional free spins round. If you want to play it for real money, you can find it at most online casinos that carry NetEnt titles.
RTP and Volatility
The RTP is 97.07%, which puts Secrets of Atlantis among the highest RTP slots you will find. The industry average sits at around 96%, so the gap is real. Medium volatility means you will hit combinations at a reasonable rate without having to wait forever for action - wins come through the base game regularly, not just during a single bonus trigger.
The hit frequency sits at around 23%, which is solid. You will not go dozens of spins without a return, and when the Highlight feature fires, the Colossal Re-Spin adds a sharper spike. Maximum win potential is 1,600x your stake.
Betting Range
Stakes run from £0.20 to £200 per spin. The range is wider than many NetEnt slots, making Secrets of Atlantis usable for casual players at lower amounts and those who prefer bigger stakes. Coin value and bet level are set separately using the controls beneath the reels. There is no bonus buy option.
Win Both Ways
Secrets of Atlantis pays in both directions - left to right and right to left on the same spin. That doubles the number of winning lines from any given set of symbols landing on the reels, which contributes to that higher hit rate. You need at least three matching symbols on adjacent reels to form a line.
Features
Nudge Wilds
The Nudge Wild is a mermaid symbol that acts as a wild for all other symbols. If it lands partially - showing on some rows but not all of a reel - it nudges up or down to cover the full reel. That means a partial wild becomes a full-reel wild, giving you the best possible substitution on that position. It does not replace other symbols already on the reel, but filling the whole reel with a wild creates strong coverage across the 40 paylines.
Highlight Feature and Colossal Symbols Re-Spin
This is the main event in Secrets of Atlantis. During any base game spin, reels 2, 3, and 4 can become highlighted - marked with a transparent frame. When all three middle reels are fully highlighted at the same time, the Colossal Symbols Re-Spin triggers.
During the re-spin, reels 2, 3, and 4 merge into a single position showing one giant 3x4 colossal symbol. Reels 1 and 5 spin normally. The colossal block on the middle reels creates powerful combinations when the outer reels match the symbol showing in the centre. There is no scatter and no traditional bonus buy - the Highlight feature fires randomly in the base game.
Stacked Symbols
All symbols appear in stacked formation across every reel. This feeds into the Colossal feature - stacked outer reels landing on the same symbol as the colossal block can fill all 40 paylines from a single re-spin result.
Symbols and Payouts
The high-value symbol is a pearl in an oyster, worth up to 400x your line bet for a five-of-a-kind. Below that sit the jewel symbols - clams, crabs, turtles, and seahorses in various colours - paying between 50x and 70x per line. Lower-value symbols are card rank icons styled to fit the underwater theme. The mermaid wild completes combinations but does not carry a payout of its own.
How to Play
Set your stake using the bet controls at the bottom of the screen. Adjust coin value and bet level separately to land on your chosen total stake. Hit Spin to start - or use Autoplay to set a number of automatic spins. Watch for reels 2, 3, and 4 to light up: when all three are framed at the same time, the Colossal Re-Spin fires. There are no free spins and no scatter to chase.
Mobile
Secrets of Atlantis runs in any mobile browser with no app needed. NetEnt built the game to scale across screen sizes, so the 4-row grid and reel controls translate well to smaller screens. The animations are lighter than some of the studio's more recent releases, which keeps load times short on mobile connections.
Who Is It For?
Secrets of Atlantis suits players who want a high-RTP base game without relying on a bonus round. The 97.07% return and medium volatility keep sessions steady. It also suits anyone who finds traditional free spins rounds repetitive - the Highlight feature and Colossal Re-Spins give a different rhythm. The wide betting range (£0.20-£200) makes it accessible to most.
It is less suited to players who want a jackpot or a bonus buy. The 1,600x max win is moderate by modern standards, and there is no way to force the Colossal feature directly.
Pros and Cons
- 97.07% RTP - one of the highest you will find in any online slot
- Win both ways on 40 paylines improves base game hit rate
- Nudge Wilds give full-reel wild coverage from partial landings
- Colossal Symbols Re-Spin offers a sharp spike without a separate bonus round
- Wide stake range from £0.20 to £200
- No scatter or free spins - the Colossal feature cannot be bought or forced
- Maximum win of 1,600x is modest compared to more recent video slots
Related
What is the RTP of Secrets of Atlantis?
Secrets of Atlantis has an RTP of 97.07%, which is well above the industry average of around 96%. This makes it one of the higher-returning NetEnt slots available.
Does Secrets of Atlantis have free spins?
No. Secrets of Atlantis does not have a traditional free spins round. The main bonus mechanic is the Colossal Symbols Re-Spin, which triggers when reels 2, 3, and 4 are all highlighted simultaneously.
What is the Highlight feature in Secrets of Atlantis?
The Highlight feature occurs when reels 2, 3, and 4 each become framed during a base game spin. When all three middle reels are highlighted at the same time, the Colossal Symbols Re-Spin is triggered, merging those reels into one giant 3x4 symbol block.
How do Nudge Wilds work in Secrets of Atlantis?
The mermaid wild symbol will nudge up or down to cover an entire reel if it lands partially. A partial wild on any row of a reel becomes a full-reel wild, maximising substitution potential across the 40 paylines.
What is the maximum win in Secrets of Atlantis?
The maximum win in Secrets of Atlantis is 1,600 times your stake. This is achieved through the Colossal Symbols Re-Spin when matching symbols fill reels 1 and 5 alongside the colossal block on reels 2-4.
What are the betting limits for Secrets of Atlantis?
Secrets of Atlantis accepts bets from £0.20 up to £200 per spin. Stake is adjusted by changing the coin value and bet level separately using the controls below the reels.
Where to Play Secrets of Atlantis
These online casinos carry NetEnt games including Secrets of Atlantis. Read our Donbet review or browse all casino reviews.
Secrets of Atlantis RTP and Variance
Secrets of Atlantis has an RTP of 97.07%, which is well above average. See our highest RTP slots for the best returning games. Low-medium volatility gives a good balance between regular payouts and occasional bigger hits.
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