NetEnt takes a deep dive into the mythical sunken city with Secrets of Atlantis. This isn’t your standard high-volatility chase. It is a calculated, atmospheric experience built on a 5-reel, 4-row grid. Most modern slots try to overwhelm the senses with loud noises and flashing lights. NetEnt chose a different path here. They focused on a serene, underwater aesthetic paired with a math model that favors the player more than most.
The standout mechanic is the “Win Both Ways” system. Most slots pay only from left to right. Here, symbols align from both sides across 40 fixed paylines. This effectively doubles the opportunities to land a winning combination on every spin. It changes how you view the reels. You aren’t just looking at the first three reels; the fifth reel becomes just as vital for starting a win.
🎮 Play Secrets of Atlantis Demo for Free
Try the free demo version to understand the mechanics without risking your bankroll. Testing the Colossus symbols in a risk-free environment is the best way to see how the Nudge Wilds interact with the grid.
📊 Characteristics and Mechanics
The technical profile of Secrets of Atlantis is its biggest draw. While many new releases cap their RTP at 96% or lower, NetEnt pushes the envelope here.
| Feature | Details |
|---|---|
| Provider | NetEnt |
| RTP (%) | 97.07% |
| Volatility | Medium |
| Max Win | 3,200x |
| Grid/Reels | 5×4 |
| Paylines | 40 (Win Both Ways) |
| Min/Max Bet | 0.40 / 100 |
| Release Date | 23.08.2024 |
An RTP of 97.07% is significantly above the industry average. This high return percentage means the house edge is less than 3%. For long-term sessions, this is a massive advantage. The medium volatility suggests a balanced distribution of wins. You won’t see your balance disappear in ten spins, but you shouldn’t expect a 1,000x hit every hour either. It is a grinder’s slot. It rewards patience and consistent betting.
✨ Theme, Graphics, and Soundtrack
The game transports you to the bottom of the ocean. The background is a dark, translucent blue showing the ruins of Atlantis. It is subtle. The symbols are encased in bubbles, which pop when part of a win. You won’t find traditional playing card icons here. NetEnt opted for thematic consistency.
Low-paying symbols include various sea creatures: a crab, a turtle, and a jellyfish, all held within ornate shells. The higher-paying symbols are represented by gemstones: blue sapphires, emeralds, and red rubies, each clutched by a golden sea creature. The highest value symbol is the white pearl inside an oyster.

The soundtrack is ambient. It features soft melodic tones and the sound of bubbling water. It’s designed to be relaxing. When the Colossus symbols land, the music swells slightly, but it never becomes jarring. The Mermaid Wild is the centerpiece of the visual design. She is a stacked symbol, appearing as a full-length character when fully nudged into place.
🎁 Bonus Features and Free Spins
Secrets of Atlantis deviates from the standard “three scatters for free spins” formula. It relies on base-game modifiers that trigger frequently. This keeps the pacing steady.
Nudge Wilds
The Mermaid is the Wild symbol. She appears stacked on the reels. If only a portion of the Mermaid lands on the grid, the Nudge Wild feature kicks in. The symbol automatically moves up or down to cover the entire reel. This can happen on any of the five reels. Since the game pays both ways, a full-reel wild in the center can bridge multiple high-paying combinations.
Highlight Feature
During any spin, the middle three reels (2, 3, and 4) can be randomly highlighted with a glowing white background. If all three center reels are fully highlighted after a spin stops, you trigger the Colossus Re-spin. This is the core engine for the game’s biggest payouts.
Colossus Re-spins
When triggered, the three middle reels transform into one giant reel. This reel contains 3×4 Colossus symbols. These are essentially massive versions of the standard symbols. If you land a Colossus Mermaid Wild, it covers the entire center of the grid. This virtually guarantees a win across all 40 lines. If the Colossus reel is only partially visible, it also nudges to cover the entire 3×4 area, matching the mechanic of the standard stacked wild.
⚖️ Pros and Cons of Secrets of Atlantis
- Exceptionally High RTP: At 97.07%, this is one of the more generous slots in the NetEnt catalog.
- Win Both Ways: The dual-direction payouts make the 40 lines feel more active and rewarding.
- Frequent Feature Triggers: The Highlight Feature and Nudge Wilds appear often, preventing long dry spells.
- Polished Atmosphere: The visuals and sound design are cohesive and high-quality.
- No Traditional Free Spins: Players who enjoy the “bonus hunt” style of gameplay might find the lack of a dedicated free spins round disappointing.
- Limited Max Win: A 3,200x cap is modest compared to modern “Megaways” or high-volatility titles.
- Repetitive Gameplay: The focus on a single core mechanic can feel mundane during very long sessions.
❓ Frequently Asked Questions (FAQ)
What is the RTP of Secrets of Atlantis?
The RTP is 97.07%. This is very high for an online slot, offering better theoretical returns than the standard 96% found in most games.
Does Secrets of Atlantis have a free spins bonus?
No, it does not use a traditional scatter-triggered free spins round. Instead, it features Colossus Re-spins triggered by the Highlight Feature on the middle reels.
Can I play Secrets of Atlantis on mobile?
Yes. NetEnt optimized this game using HTML5 technology. It runs smoothly on both iOS and Android devices directly through the mobile browser.
How do I win the maximum payout?
The max win of 3,200x is usually achieved during a Colossus Re-spin. You need to land the Pearl symbol or the Mermaid Wild as a Colossus symbol while matching high-value symbols on reels 1 and 5.
What does “Win Both Ways” mean?
In most slots, symbols must line up from the leftmost reel to the right. In this game, they can also line up from the rightmost reel to the left, provided they are on one of the 40 paylines.
Secrets of Atlantis is a specialized tool in a gambler’s arsenal. It isn’t built for the thrill-seeker looking for a 50,000x “moon shot.” It is built for the player who understands house edges and wants their bankroll to last. The combination of Win Both Ways and a 97.07% RTP makes it a solid choice for clearing wagering requirements or simply enjoying a low-stress session. The Nudge Wilds add just enough unpredictability to keep the base game from becoming stagnant. If you prefer steady hits over volatile droughts, this underwater city is worth a visit.













