Game Reviews

3 Secret Cities Casino Game Review

May 21, 2026

An adventurous landscape featuring an ancient stone temple nestled in a lush jungle with cascading waterfalls and white birds in flight. The large, stylized gold and stone text "3 SECRET CITIES" sits prominently in the foreground, framed by tropical greenery against a backdrop of distant mountains and a soft sunset sky.
  • Progression mechanic improves upcoming bonus rounds during standard play.
  • 1,024 ways to win across a five-by-four grid layout. 
  • The Temple Pick round determines spin counts, multipliers, and stacked symbols.
  • Potential maximum win of 50,000x the initial stake. 

Journey through ancient ruins in the 3 Secret Cities slot game, an adventurous title that tasks players with discovering hidden temples across three distinct locations. This themed slot uses a 5×4 grid and replaces traditional paylines with 1,024 ways to win, where matching symbols simply need to land on adjacent reels starting from the left. 

Some ongoing or limited-time casino bonus offers at Borgata Online could apply to this game. You can register for an account to explore the platform and learn about any current casino bonuses for deposit match, free spins, and more. If you are looking to play online slots for real money, checking the promotions page after logging in is a helpful way to see how current offers might align with your session. 

3 Secret Cities Game Highlights

This title stands out among online casino games for how it builds continuity between sessions and adds variation beyond standard spin-and-trigger mechanics.

  • Persistent bonus progression: BONUS↑UP carries over between sessions, allowing progress toward stronger bonus rounds to build over time rather than resetting after each feature.
  • Multiple reward paths in base play: Scatters can unlock instant cash prizes or advance progression, creating added activity even outside of bonus rounds.
  • Mobile-optimized reel format: BIG REEL Portrait Mode™ adapts the layout for vertical play, changing how wins are displayed without altering the core rules.

3 Secret Cities Slot Quick Facts and Features

Software ProviderSlingo
RTP96.50%*
VolatilityVery High
Jackpot TypeN/A
Paylines1,024 Ways
Reels5
Max WagerN/A
Max Win50,000x

* Please note that the return to player (RTP) rate for this slot game may differ from one jurisdiction to another. 

A screenshot of a five-reel video slot interface set in a tropical jungle. The reels feature vibrant symbols, including an explorer, a priestess, a black panther, and a golden sun mask. The UI displays "BONUS UP" top prizes in the corner, with balance, win, and bet amounts shown in a sleek bar at the bottom.

Does the 3 Secret Cities Slot Pay Real Money?

Yes, the 3 Secret Cities slot game pays real money to players who wager with actual currency at Borgata Online. To be eligible for real winnings, you must be physically located within New Jersey or Pennsylvania, which are the two states where Borgata Online is legally active and regulated.

How To Play the 3 Secret Cities Slot

Navigating the mechanics of this Slingo slot game involves understanding how the progression map interacts with your spins.

  1. Set your wager: Use the plus and minus buttons to choose a bet amount that aligns with your slot bankroll management strategy. 
  2. Start a round: Press the SPIN BUTTON to begin; PC users can also enable the space bar to spin in the options menu.  
  3. Monitor progression: Check the map panel to see your current city and the available prize levels for the next bonus.  
  4. Enter the temple: Land Scatters on reels 1, 3, and 5 to trigger the Temple Pick and Free Spins rounds. 
  5. Choose your view: On mobile, you can toggle BIG REEL Portrait Mode™ to enlarge the grid for a more vertical visual experience.  

3 Secret Cities Game Features

The 3 Secret Cities slot game structures its features around progression, where Scatter outcomes, bonus triggers, and selection mechanics all contribute to how bonus rounds develop.

3 Secret Cities BONUS↑UP Feature

The BONUS↑UP Feature tracks progression as the base game is played, improving the potential rewards available in future bonus rounds. This progression is divided across three locations: Jungle City, Lake City, and Gold City, each with increasing prize potential. Movement between locations is achieved through Scatter outcomes, while prize levels within each location improve over time.

After a Free Spins round ends, the location resets to Jungle City, but overall BONUS↑UP progress is retained between sessions.

3 Secret Cities Scatter Feature

Scatter symbols play multiple roles within the game. When they land on reels one, three, and five, they trigger the Free Spins Feature. When they land only on reels one and three, they can either award a cash prize of up to 50x the bet or advance the player’s progression within the BONUS↑UP system. This gives Scatter outcomes value both as a bonus trigger and as a progression mechanic.

3 Secret Cities Free Spins Feature

The Free Spins Feature is activated by landing Scatter symbols on reels one, three, and five. The feature begins at the same stake as the triggering spin and follows the Temple Pick round. During Free Spins, additional Scatter combinations on reels one and three can award between five and 10 extra spins, determined through a selection mechanic.

3 Secret Cities Temple Pick Feature

The Temple Pick Feature determines the structure of the Free Spins round. Players select one block from each row, starting from the bottom, with each selection revealing either a number of Free Spins, a win multiplier, a super stacked symbol, or an end to the pick phase. The potential rewards available in this selection are influenced by the player’s current BONUS↑UP progression.

3 Secret Cities Wild Symbol Feature

Wild symbols substitute for all standard symbols except Scatters, helping to complete winning combinations across the 1,024 ways to win system. Because wins are calculated based on adjacent reels rather than fixed paylines, the Wild symbol supports multiple combination paths within a single spin.

3 Secret Cities BIG REEL Portrait Mode Feature

BIG REEL Portrait Mode™ is available when playing on mobile in portrait orientation. This mode enlarges and stacks the reels vertically, changing the visual layout so that reels spin right to left and wins are displayed from top to bottom. While the presentation differs, the underlying game rules, payouts, and feature behavior remain unchanged.

3 Secret Cities Buy Feature

The Buy Feature allows players to directly access a Free Spins round from the base game. Before the feature begins, one of three temple options can be selected. The player’s existing BONUS↑UP progression is retained when entering the feature. The help file specifies that the RTP during the Buy Feature is 98%.

3 Secret Cities Slot Bonuses and Jackpots

The 3 Secret Cities slot game does not use traditional fixed or progressive jackpots. Instead, payouts are tied to bonus outcomes and can vary based on how bonus rounds are structured during play.

Cash rewards can be awarded directly through Scatter outcomes in the base game, with values reaching up to 50x the bet. Additional winnings are generated during bonus rounds, where outcomes are influenced by multipliers, stacked symbols, and the number of Free Spins in play.

Because bonus rounds can scale in value over time, the size of potential payouts is not fixed. The game features a theoretical maximum win of up to 50,000x the bet

How To Win the 3 Secret Cities Slot

Wins in the 3 Secret Cities slot game are achieved by landing matching symbols on adjacent reels, beginning from the leftmost reel. Because paylines are removed in favor of 1,024 ways, symbols only need to appear on consecutive reels to count. If a reel contains multiple instances of a winning symbol, the payout is multiplied by the number of symbols on each reel to determine the final payout multiplier.

While outcomes are entirely random, it is essential to understand how high-volatility titles behave over time

3 Secret Cities Slot Graphics and Design

The 3 Secret Cities slot game uses a location-based visual style that shifts as progression advances through its three environments. Early stages lean into dense jungle scenery with darker greens and stone textures, while later stages introduce cooler tones and eventually gold-accented visuals tied to higher-tier locations.

Symbols and interface elements are clearly defined against the background, allowing bonus elements and key icons to remain visible even during feature-heavy sequences. Audio design supports the setting with ambient tones and subtle transitions between base play and bonus rounds, reinforcing the change in atmosphere without distracting from gameplay.

3 Secret Cities Slot Symbols

The symbol set combines thematic icons with standard playing card values. Higher-value symbols reflect the exploration theme, including temple artifacts and location-based visuals, while lower-value symbols use traditional card ranks. The Wild symbol is marked clearly and substitutes for most standard symbols to help complete winning combinations. Scatter symbols are distinct and tied to both bonus access and additional rewards.

A celebratory game screen showing an "EPIC BIG WIN" notification in ornate, glowing gold and blue lettering. Animated gold coins and blue diamonds burst across the screen over the reels, with a counter displaying a win amount of €1,353.00.

Similar Slot Games To Play at Borgata Online

If you enjoy exploration themes and bonus rounds that evolve over time, these adventure-driven titles offer a similar style of gameplay.