The King by Endorphina is a medieval fantasy slot built on a 5-reel, 3-row grid with 10 fixed paylines. The game uses themed symbols including a crowned king, an archer, shields, crowns, treasure chests, and stylised card symbols. A Wild symbol substitutes for all symbols except Scatter.
The Scatter symbol pays anywhere on the reels and triggers 15 Free Games with a x3 multiplier. Payline wins are formed on adjacent matching symbols across active lines, while scatter wins are calculated separately. The game rules screen also shows a bet control, total bet display, spin, auto-play, and menu options.
A demo version is available to play for free, allowing users to practice before playing for real money. The layout combines stone, wood, and gold visual elements, with line indicators and payline paths shown over the reels for easier reading of the game mechanics.