Developer 
Rows 
Features Cluster Kingdom is a 5x5 slot from ELK Studios with cluster pays, wild symbols, multiplier wilds and symbol upgrades. The game uses a high-volatility format and is listed with a 94% RTP. Its maximum potential is 10,000x bet, with stakes ranging from 0.2 to 100.
The feature set includes Sticky Redrops, where new redrops can continue when fresh matching symbols land, plus several character-based features. The King upgrades a payout symbol, the Queen rearranges symbols near her position, and the Princess can place 1 to 4 wilds on the grid. These mechanics can affect cluster formation and winning combinations during the base game.
There are three bonus games: Regular Bonus, Mini Bonus and Super Bonus. The Super Bonus is triggered by connecting the King to both the Queen and the Princess, while X-iter offers access to different game modes with varying bet levels and bonus entry chances. This demo version is available to play for free, making it suitable for practice before playing for real money.
