Secrets of Atlantis Slot Review
Free demo, RTP, volatility and max win
7.9Value score · Good · how it works
Secrets of Atlantis review: NetEnt's 2016 underwater 40-line slot with colossal re-spins and nudge wilds; Medium volatility, 97.07% RTP.
- #101by RTP of 3,708 slots
- #43by value of 226 NetEnt slots
- #19by value of 73 slots from 2016
Play Secrets of Atlantis free: demo, no sign-up
Free play money from NetEnt's official demo. 18+. No deposit and no account; a demo does not predict real results.
Basic information
| Software | NetEnt |
|---|---|
| Release year | 2016 |
| RTP | 97.07% |
| Volatility | Medium |
| Max win | x1,600 |
| Hit frequency | 23% of spins |
| Game type | Slot |
| Data verified | 2026-09-28 |
Source: NetEnt game page; RTP database by toolsgambling.com (CC BY 4.0); image: NetEnt promotional image from the official game page. How we collect data · Report a mistake
Secrets of Atlantis review
NetEnt released Secrets of Atlantis in 2016, a 5-reel, 40-line slot that pays both ways and is set among sea creatures and a shadowy mermaid. Its features are a mix of old-school and unusual: highlight zones that can fuse three reels into one tall reel, nudge wilds that slide into place and re-spins that fall out of them. The return is high at 97.07% and volatility is Medium, with a top win of 1,600x the bet.
Win Both Ways on a 5x4 grid
The grid has five reels and four rows with 40 lines. The studio lists Win Both Ways among the game's features. Bets run from €0.20 to €200.00.
Highlights and the colossal re-spin
During any spin, the Highlight feature can randomly mark symbols on reels 2, 3 and 4. If all three reels are highlighted, a Colossal Symbol Re-Spin begins. In it, reels 2, 3 and 4 merge into a single reel that shows Colossal Symbols.
A colossal symbol is a 3x4 block, and it can only appear during these re-spins. If the entire merged reel is highlighted during one, an extra Colossal Re-Spin is awarded. So the feature can chain.
Highlight feature
Randomly highlights symbols on reels 2, 3 and 4. Highlighting all three triggers the Colossal Symbol Re-Spin.
Colossal Symbol Re-Spin
Merges reels 2, 3 and 4 into one reel of 3x4 colossal symbols. A fully highlighted merged reel earns another re-spin.
Nudge Wilds
Nudge Wilds can land partly or fully on a reel, depending on how the spin resolves. A wild that lands partly is nudged up or down so that it covers the whole reel. The same applies to a Colossal Stacked Wild during a colossal re-spin, which is also moved into full view.
A wild that is only half visible therefore ends up working as a full-reel wild.
Where the RTP stands
The studio's page rounds the return to 97.1%, while the exact figure is 97.07%. That is a house edge of 2.93%, about $29.30 lost per $1,000 wagered over a long run. A 100-spin session costs $0.59 on average at $0.20, $2.93 at $1 and $14.65 at $5.
The max win is 1,600x the bet, which is $320 at $0.20, $1,600 at $1 and $8,000 at $5. The listed hit frequency is 23%, and volatility is Medium.
Medium volatility alternatives
Hotline from 2018 lists 97.04% and 1,200x, and Steam Tower 97.04% and 1,000x. Reel Rush from 2013 shows 96.96% and 1,000x, Warlords - Crystals of Power 96.89% and 1,500x, and Pyramid: Quest for Immortality 96.48% and 1,700x. Space Wars, from 2013, lists 96.75% and 1,000x. Secrets of Atlantis has the highest RTP in this group.
Pros
- A 97.07% RTP, one of the higher figures among its Medium volatility neighbours
- Partly visible Nudge Wilds are moved to cover the full reel
- Colossal re-spins can chain through highlighted reels
- Medium volatility with a 1,600x top win
Cons
- Max win of 1,600x is modest
- A 23% hit frequency means most spins do not win
- The studio text we hold does not describe a free spins round
Verdict
Secrets of Atlantis is a 2016 NetEnt slot built on a handful of mechanics: highlighted reels, colossal re-spins and nudge wilds. The 97.07% RTP is a 2.93% house edge, about $29.30 per $1,000, and Medium volatility suits its 1,600x ceiling. It is aimed at players who want a calmer pace and an older design. It is still paid entertainment with a cost, so decide a budget before you start.
Sources: NetEnt official game page; RTP, volatility and max win from the open Slot RTP Database.
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Secrets of Atlantis RTP
The data lists one RTP for Secrets of Atlantis. Versions are not tracked for NetEnt games, so other versions may exist; check the game's info screen.
- 97.07% $29.30 lost per $1,000
Cost of 100 spins
| Bet | Wagered | Average cost at 97.07% |
|---|---|---|
| $0.20 | $20 | $0.59 |
| $1 | $100 | $2.93 |
| $5 | $500 | $14.65 |
Averages computed from the published RTP; real sessions vary widely around them. RTP calculator
Secrets of Atlantis max win, volatility & stats
- Value score
- 7.9 / 10
- Lost per $1,000 (average)
- $29.30
- Max win at $1 bet
- $1,600
- Wins on average
- 1 in 4.3 spins
Percentiles compare this game with the 3,708 games in the catalogue. Max win: 1,600×.
