Last Updated on August 12, 2026 by Maurya
Sunken City Riches is an upcoming Stakelogic video slot that takes players beneath the waves in search of an ancient city, scattered treasure-map fragments, enchanted gems and hidden riches. Rather than relying on a conventional base game followed by an occasional Free Spins round, the slot puts progression at the centre of the experience.
The headline specifications immediately place Sunken City Riches at the more adventurous end of Stakelogic’s portfolio. The official developer page confirms 1,024 Payways, a 96.01% RTP, five-star volatility, a maximum multiplier of 15,000x and a maximum advertised win of €450,000.
There is an important point to make before going further. At the time of this review on August 12, 2026, Stakelogic’s own games catalogue still labels Sunken City Riches as “Coming Soon.” Independent pre-release information lists August 25, 2026 as the planned launch date. That means some feature information remains preview data and should be checked against the final in-game rules once the slot becomes widely available for real-money play.
Even at this pre-release stage, however, Sunken City Riches looks more mechanically ambitious than the average treasure-themed slot. Its combination of a Treasure Map progression meter, a separate Gem Meter, reel-modifying features, Free Spins and a Mystery Pick Bonus gives players several things to follow simultaneously.
Sunken City Riches slot specification
| Feature | Details |
| Slot Provider | Stakelogic |
| Game Type | Video Slot |
| Grid | 5 reels x 4 rows reported |
| Pay System | 1,024 Payways |
| RTP | 96.01% |
| Volatility | Very High / 5 stars |
| Maximum Win | 15,000x stake |
| Maximum Advertised Prize | €450,000 |
| Theme | Sunken city / underwater treasure |
| Main Mechanic | Dual progression system |
| Free Spins | Yes |
| Mystery Pick Bonus | Yes |
| Treasure Map Features | Yes |
| Gem Meter | Yes |
| Super Stake | Reported |
| Bonus Buy | Reported at 100x stake |
| Release Status | Coming Soon as of August 12, 2026 |
Stakelogic directly confirms the RTP, 1,024 Payways, maximum multiplier, maximum win and five-star volatility. Details including the reported 5×4 layout, progression thresholds, Super Stake and 100x Bonus Buy come from current preview material and should be verified in the final game client.
Theme, Graphics and Presentation
Sunken City Riches follows a classic lost-world adventure theme, but Stakelogic moves the action underwater. The developer describes the story as a quest to recover pieces of an ancient map that eventually lead to a legendary city hidden beneath the sea.
Players are accompanied by a mischievous monkey who helps uncover clues as the journey progresses. Enchanted gems and ancient doors form another part of the narrative, reinforcing the sense that each spin contributes to an ongoing treasure hunt rather than existing in isolation.
That concept fits the progression mechanics particularly well. Many slots attach a meter to the side of the reels simply as an additional bonus trigger. Sunken City Riches appears to make its meters fundamental to the experience. Collecting the right symbols gradually changes what can happen during subsequent spins.
The result should appeal to players who enjoy slots where the interface develops during a session. Instead of waiting exclusively for three Scatters to trigger a conventional bonus, there are intermediate milestones to reach along the way.
How Does Sunken City Riches Work?
Sunken City Riches reportedly uses a 5×4 reel configuration with 1,024 Payways. The 1,024-way system itself is confirmed by Stakelogic.
Payways differ from traditional fixed paylines. Rather than needing identical symbols to appear along predetermined lines, winning combinations generally depend on matching symbols appearing on consecutive reels in qualifying positions.
The biggest gameplay difference, however, comes from the game’s dual progression system.
Two meters develop alongside one another:
- the Treasure Map Meter, which unlocks additional reel mechanics;
- the Gem Meter, which collects multiplier values and can ultimately activate the Mystery Pick Bonus.
Current preview information says every relevant Treasure Map Scatter helps advance both systems, meaning one symbol can contribute towards several future features.
That interconnected structure is the strongest idea in the game. There is always a risk with meter slots that progress feels cosmetic. Here, reaching milestones reportedly unlocks actual modifiers that can remain relevant as the session develops.
Treasure Map Meter Explained
The Treasure Map Meter is arguably the signature mechanic in Sunken City Riches.
According to available pre-release rules, collecting Treasure Map Scatters unlocks four successive features:
| Treasure Map Scatters | Feature |
| 4 | Payway Maker |
| 8 | Symbols Upgrade |
| 12 | Wild Multipliers |
| 16 | Split Symbols |
These mechanics are progressively introduced rather than being available from the first spin.
Payway Maker
The Payway Maker is the first unlock and is designed to improve the potential structure of winning combinations across the reels.
That makes sense as an early progression reward because Sunken City Riches already operates with 1,024 Payways. Anything that improves symbol positioning or creates stronger ways to connect matching symbols can potentially increase the excitement of an otherwise ordinary spin.
Symbols Upgrade
The next level introduces the Symbols Upgrade feature.
Symbol-upgrade mechanics typically become more interesting when low-value icons can be converted into stronger-paying symbols, particularly when several matching positions are affected at once. The important factor will be precisely how often Stakelogic activates the upgrade and which symbols are eligible.
Those final details should be checked in the finished paytable when the game officially launches.
Wild Multipliers
Collecting 12 Treasure Map Scatters reportedly unlocks Wild Multipliers.
Multiplier mechanics are particularly relevant in a slot with a 15,000x maximum-win ceiling because they provide one potential route towards larger combinations. However, a high theoretical maximum should never be mistaken for a likely session result.
Split Symbols
At 16 collected Treasure Map Scatters, Split Symbols become available.
Split mechanics can effectively increase symbol presence within a reel position, potentially creating additional combinations across the slot’s Payways.
Taken together, these four stages give the base game a stronger feeling of development than a slot where every paid spin starts from exactly the same mechanical position.
Gem Meter and Mystery Pick Bonus
While the Treasure Map Meter unlocks gameplay modifiers, Sunken City Riches runs another progression system simultaneously.
The Gem Meter reportedly collects multiplier values shown on Treasure Map Scatter symbols. Those values accumulate until the player has collected 20 Gems. At that point, they are transferred into the Mystery Pick Bonus.
The pick feature uses a board containing 20 hidden gears. Selecting gears reveals stored multiplier prizes, and the process continues until a Collect Gear is found. The previously uncovered multiplier values are then added together to determine the feature payout.
This is a clever counterpoint to the Treasure Map mechanic.
One meter improves or expands the gameplay, while the other builds towards a standalone reward event. Consequently, players aren’t necessarily collecting symbols towards only one destination.
It also gives Sunken City Riches something beyond the familiar “collect three Scatters, play Free Spins, return to base game” formula.
Sunken City Riches Free Spins
Free Spins remain an important part of the package.
Current preview information states that landing:
- 3 Scatters awards 8 Free Spins
- 4 Scatters awards 10 Free Spins
- 5 Scatters awards 12 Free Spins
During the bonus, additional Scatters can reportedly retrigger the feature, with three, four or five Scatters adding three, four or five extra spins respectively.
More importantly, the Treasure Map progression is not thrown away when Free Spins begin.
Previously unlocked Treasure Map features remain available during the bonus, and current rules indicate that at least one unlocked feature is guaranteed on each Free Spin. That means Payway Maker, Symbol Upgrades, Wild Multipliers and Split Symbols can potentially play a meaningful role in the bonus after they have been unlocked.
This creates an interesting strategic perception even though slot outcomes remain determined by the game’s mathematical model: reaching Free Spins after substantial map progression may feel more valuable because more mechanics are active.
Players should be careful not to turn that perception into chasing behaviour. Having a nearly completed meter does not mean the next few paid spins are guaranteed to produce a profitable result.
RTP – What Does 96.01% Mean?
Stakelogic lists the Sunken City Riches RTP at 96.01%.
That translates to a theoretical house edge of approximately 3.99%.
RTP is a long-term mathematical figure calculated across an enormous number of game rounds. It does not mean that staking £100 will result in exactly £96.01 being returned during an individual session.
A player could finish well ahead, lose much of a balance quickly or experience something between those outcomes.
Because online casinos can sometimes offer different mathematical configurations of the same game, it is sensible to open the information or help menu at the casino you are using and confirm that 96.01% is the RTP displayed in the actual real-money version.
One current review source was able to verify the 96.01% headline configuration but recommends checking the casino client rather than assuming every implementation is identical.
Very High Volatility
Sunken City Riches carries Stakelogic’s maximum five-star volatility rating.
That is arguably more important to understand than the 15,000x maximum win.
Very high volatility usually means outcomes can be uneven. Larger prizes may be possible, but substantial winning combinations can be separated by periods where returns are considerably smaller.
For that reason, Sunken City Riches is unlikely to suit players whose main preference is frequent small wins and a relaxed bankroll curve.
It looks much better suited to those who specifically enjoy high-variance slots and who are comfortable reducing their stake size accordingly.
No bankroll guarantees safety or profit. If playing for real money, decide your maximum spend before starting rather than increasing the budget simply because a progression meter appears close to another milestone.
Maximum Win – Up to 15,000x
Stakelogic officially advertises a maximum multiplier of 15,000x and a maximum win of €450,000 for Sunken City Riches.
A 15,000x ceiling is substantial.
For perspective, a hypothetical £1 qualifying stake multiplied by 15,000 would equal £15,000. That example simply demonstrates the multiplier mathematics; it should not be interpreted as a typical or expected payout.
Maximum-win figures are best viewed as descriptions of a game’s upper mathematical limit, not as predictions.
Players should also inspect the casino’s terms and game rules because maximum payout limits, stake restrictions and local regulations may affect real-money play.
Sunken City Riches Bonus Buy
Current preview information reports that Sunken City Riches includes a Bonus Buy priced at 100x the total bet, providing direct entry into Free Spins.
Availability may vary significantly by jurisdiction.
Some regulated gambling markets restrict or prohibit feature-buy functionality, so the button may not appear at every casino even when the underlying game supports it.
A Bonus Buy should also not be treated as a shortcut to profit. Paying 100 times the normal stake concentrates substantially more money into a single bonus event, which can make bankroll swings particularly severe in a very-high-volatility game.
Super Stake
Sunken City Riches is also reported to support Stakelogic’s Super Stake option.
Preview information says activating it increases the total bet by 50% while improving the probability of landing Scatter symbols and entering Free Spins.
This option changes the cost structure of every qualifying spin, so players should check the on-screen wager carefully before activating it.
It is particularly important when playing with bonus funds because casino promotions often impose maximum-bet rules. Using an enhanced stake or feature purchase can potentially conflict with promotional terms.
Mobile Play
Sunken City Riches is designed as a modern online video slot and free/demo versions are already being surfaced online ahead of the wider release. One current review also lists mobile compatibility as supported.
The progression-heavy structure should translate naturally to phones and tablets as long as the Treasure Map and Gem meters remain easy to read on smaller displays.
When playing on mobile, don’t overlook the information panel. RTP, stake size and feature rules matter considerably more than screen animations, particularly with a five-star-volatility game.
What We Like About Sunken City Riches
Sunken City Riches has several clear strengths.
The progression system has genuine purpose. Rather than displaying an arbitrary meter, collecting Treasure Map Scatters progressively introduces Payway Maker, Symbol Upgrade, Wild Multiplier and Split Symbol mechanics.
Two progression paths run simultaneously. Building towards Treasure Map features while also filling the Gem Meter gives the game additional depth.
Free Spins interact with previous progression. Keeping unlocked mechanics active during Free Spins makes the bonus feel connected to the base game rather than completely separate.
The RTP is competitive. The developer-confirmed 96.01% figure gives the slot a reasonable headline return for a modern high-volatility release.
The maximum potential is significant. A 15,000x ceiling provides considerable theoretical upside for players who actively seek high-variance slots.
Potential Drawbacks
The same structure also creates several disadvantages.
The biggest is very high volatility. Five-star volatility can translate into unpredictable bankroll movement and periods without meaningful returns.
Progression mechanics may also encourage longer sessions. When a meter is close to its next milestone, it can be tempting to continue playing simply because the next unlock appears near. Players should remember that visual progression does not guarantee that subsequent spins will recover previous losses.
The game may also take time to reveal its full mechanical potential. Players who want every feature available immediately could find the gradual unlock system less appealing.
Finally, Sunken City Riches is still a pre-release title as of August 12, 2026. Stakelogic currently labels the game “Coming Soon,” so certain secondary-source details need to be reconfirmed against the finished paytable after launch.
Is Sunken City Riches Worth Playing?
Based on the currently verified specifications, Sunken City Riches looks like one of Stakelogic’s more interesting progression-focused releases of 2026.
The attraction isn’t simply its 15,000x maximum win. The combination of two progression meters, four gradually unlocked Treasure Map modifiers, a separate Mystery Pick Bonus and Free Spins that preserve previously unlocked features creates a stronger identity than a generic underwater slot.
Its 96.01% RTP is another positive, while the 1,024 Payways structure provides plenty of routes for symbol combinations.
The five-star volatility rating is the main caution. This is not a slot we would categorise as ideal for players looking for gentle, low-risk entertainment or consistently frequent returns.
A sensible approach is to try the free-play version first, understand how the meters work and then decide whether the high-volatility mathematics suits your preferences before considering real-money play.
Verdict
Rating: 4.2/5 based on pre-release information
Sunken City Riches has the ingredients of a strong Stakelogic release. The underwater treasure setting is familiar territory for online slots, but its underlying mechanics give the concept more substance.
The standout element is undoubtedly the dual progression structure. Collecting Treasure Map symbols doesn’t merely lead to a single feature. It gradually adds new mechanics while simultaneously feeding multiplier values into the Gem Meter.
Free Spins then build on that progression rather than resetting the experience.
Add a developer-confirmed 96.01% RTP, 1,024 Payways, five-star volatility and a maximum win of 15,000x, and Sunken City Riches clearly targets players who prefer feature-heavy, high-variance slots.
Our main reservation is simply timing. Because Stakelogic still lists Sunken City Riches as “Coming Soon” on August 12, this rating should be viewed as a pre-release assessment. We would recommend confirming the final RTP, feature rules, Bonus Buy availability and stake settings inside the live casino version once the game officially launches.
FAQs
Who developed Sunken City Riches?
Sunken City Riches is developed by Stakelogic, which lists the title as a standard video slot in its online games portfolio.
What is the RTP of Sunken City Riches?
The official Stakelogic page lists an RTP of 96.01%. Players should still check the RTP displayed inside the real-money game client because casino configurations can differ.
What is the maximum win?
Sunken City Riches offers a developer-advertised maximum multiplier of 15,000x the stake, with Stakelogic also displaying a maximum win of €450,000.
Is Sunken City Riches high volatility?
Yes. Stakelogic rates Sunken City Riches at five stars for volatility, putting it in the provider’s very-high-volatility category.
How many Payways does Sunken City Riches have?
The slot uses 1,024 Payways rather than a small set of conventional fixed paylines.
Does Sunken City Riches have Free Spins?
Yes. Pre-release information describes a Free Spins feature where three, four or five Scatters award eight, ten or twelve spins respectively. Previously unlocked Treasure Map mechanics remain active during the feature.
Does Sunken City Riches have a Bonus Buy?
Current preview information reports a 100x-stake Bonus Buy. The feature may not be available in every jurisdiction or casino, so players should check the final game client.
What are the Treasure Map features?
The reported progression unlocks Payway Maker after four collected Scatters, Symbols Upgrade after eight, Wild Multipliers after twelve and Split Symbols after sixteen.
What does the Gem Meter do?
The Gem Meter reportedly collects multiplier values from Treasure Map Scatter symbols. After 20 Gems have been collected, those values move into the Mystery Pick Bonus, where revealed multipliers are accumulated until a Collect Gear appears.
When will Sunken City Riches be released?
Stakelogic currently labels the game Coming Soon. Pre-release coverage lists August 25, 2026 as the expected release date. Since the official developer page had not yet marked the game fully released when this review was prepared on August 12, players should treat August 25 as the scheduled date rather than assuming the slot is already available at every casino.
Responsible Gambling
Sunken City Riches is a very-high-volatility gambling game, and neither its RTP nor its 15,000x maximum win guarantees a profit. RTP represents theoretical long-term performance rather than the result of any individual session.
If you choose to play for real money, use money you can afford to lose, set spending and time limits before starting, and avoid increasing stakes to recover previous losses. Progression meters should be viewed as entertainment mechanics rather than a reason to continue gambling beyond a predetermined budget.
