Stakelogic releases Sunken City Riches, a 15,000x slot with two parallel progression meters

Stakelogic released the video slot Sunken City Riches on 26 October 2026. The game uses a five-reel, four-row layout set in a flooded ancient city. It starts with 1,024 ways to win, which can grow to 7,776 as features are unlocked. It has an RTP of 96.01% and a maximum win of 15,000x the stake.

The central mechanic is a pair of progression meters that run at the same time and are both fed by Treasure Map Scatter symbols. The Treasure Map Meter unlocks a new reel modifier for every four scatters collected, moving through a fixed sequence of four features: Payway Maker, Symbols Upgrade, Add Wild Multipliers and Split Symbols. Once unlocked, each modifier stays active, can trigger at random on later spins, and more than one can appear on the same spin.

The Gem Meter works differently. Rather than paying out scatter multipliers straight away, it banks them. Values are graded by colour, from green at 1x up to purple at 500x to 1,000x. When 20 gems have been collected, the Mystery Pick Bonus opens. Players then select gears until the Collect Gear is revealed, and the accumulated multiplier is applied to the stake.

The Free Spins feature is triggered by three or more Free Spins Scatter symbols. Retriggers award three, four or five extra spins, and all four Treasure Map features are active during the round, with at least one guaranteed on every spin. Players can also use a Super Stake option, costing 50% of the base bet, to double the frequency of free-spin triggers, or buy the bonus directly for 100x the stake.

James Jelliffe, Head of Slots at Stakelogic, said the game is built around progress that persists, so that the game a player sees after some spins differs from the one they started with. He added that pairing the two meters gives players two objectives at once, and that visibly banking multipliers before they are paid gives the pick bonus added weight.

Stakelogic is a Dutch casino content studio founded in 2014. It distributes video slots, dice games and live casino titles across more than 20 regulated markets, holds licences from the Malta Gaming Authority and the UK Gambling Commission, and became part of SEGA SAMMY CREATION in April 2025.