King of Cards™

King of Cards™ by Greentube is a 5-reel, 3-row video slot with 9 paylines and a medium-high volatility profile. The game uses royal card imagery, including A, K, Q, J, 10 and 9 symbols, alongside suit icons and themed king and joker-style symbols. The interface shows credit, total bet and line selection controls, with bets ranging from 3 to 50.

The slot includes a Wild-style substitute symbol that can help complete winning combinations, plus a Scatter feature that triggers 15 free games with a 3x multiplier. A paytable screen lists symbol payouts and explains the bonus rules. Players can use the demo version to play for free and practice before playing for real money.

After a winning spin, the game also offers a Red/Black gamble feature that can be used to double or quadruple the prize, with the option to take the win instead. The layout keeps a classic slot format while adding separate bonus screens for free spins and gamble rounds.