Four collected map symbols unlock the first reel feature in Sunken City Riches, Stakelogic’s new slot released on 29 September 2026. Further symbols unlock upgrades, multiplier wilds and split symbols as the treasure hunt progresses.
The five-reel game follows a search for a lost underwater city, with a monkey companion and a map meter above the reels.
Sunken City Riches demo
The demo below uses virtual credits. There are no real-money stakes or cash prizes. 18+.
What collecting the map symbols unlocks
The first stop is Payway Maker. After four Treasure Map scatters have been collected, it takes a randomly selected symbol from reel one and copies it across the remaining reels.
Eight collected scatters unlock Symbols Upgrade. This changes a randomly chosen paying symbol into the game’s highest-paying symbol.
At 12 scatters, the game unlocks a feature that adds between one and three multiplier wilds. Reaching 16 unlocks Split Symbols, which splits between one and ten symbols.
These features can activate again at random on later spins once unlocked. Several can occur in the same spin. Changing the stake resets the Treasure Map and Gem meters.
Gems and a separate free spins round
Treasure Map symbols also contribute to the Gem Meter, which stores their multiplier values. Collecting 20 gems triggers the Mystery Pick Bonus.
The collected gems transfer into this round, where players reveal gears until a Collect Gear appears. The awarded multiplier is then applied to the stake.
Free spins have a separate trigger: three or more Free Spins scatters. At least one feature is guaranteed on every free spin, while retriggers can add another three, four or five spins.
Stakelogic’s game details list 1,024 ways to win, high volatility and a maximum win of 15,000 times the stake.
Daniel is a content creator at Mr Win and has worked in the iGaming industry since 2012. With more than a decade of experience reviewing casino operators and bonuses, he focuses on safe play, licensing standards, and helping players find fair gaming sites.