Welcome Offer
18+. New Players only. Min. deposit $20. Max bonus of 100% up to $50 on 1st deposit, 25% up to $100 on 2nd deposit and 50% up to $150 on 3rd deposit. Wagering required applies on all bonuses x35. 20 extra spins will be credited daily for 5 days upon first deposit. Extra spins are available on select games only. Any unused spins will expire 24hours after issue. Full T&Cs apply.
Mystery Mine

Play Mystery Mine slot online at King Casino

*Any values mentioned are subject to change.


Basic Rules

  • Wins on multiple lines are added together.
  • All line wins pay from left to right on adjacent reels, starting with the leftmost reel.
  • Only the highest line win is paid on each active pay line.
  • Scatter wins are paid in addition to line wins.
  • Only the highest scatter win is paid per play.
  • All line wins are multiplied by the bet multiplier.

Dynamite Reveal Feature Rules

  • The Dynamite symbol appears on reels 2, 3, and 4 only.

Re-Spin Feature Rules

  • The Re-Spin Feature begins when a Dynamite symbol reveals Gold Nugget symbols at every position on the reel where the Dynamite symbol appears.
  • Once triggered, two re-spins will be awarded, and all reels with stacked Gold Nugget symbols will be held during all re-spins.
  • The Mystery Mine symbol is not present during the Re-Spin Feature.
  • During re-spins, if a Dynamite symbol appears, it will:
    • Reveal Gold Nugget symbols at every position on the reel where the Dynamite symbol appears.
    • Keep the stacked Gold Nugget symbols held for the remainder of the re-spins.
    • Award one additional re-spin.

Gold Cart Bonus Rules

  • Three or more Gold symbols will award a prize according to the paytable.
  • The Double Gold symbol counts as two Gold symbols.
  • The Triple Gold symbol counts as three Gold symbols.

Free Games Bonus Rules

  • The player is awarded 5 Free Spins at a 1x multiplier and presented with a wheel containing Free Spin values and multipliers.
  • The player is prompted to spin the wheel.
  • If the pointer lands on a Free Spin value wedge, that value is added to the Free Spin total.
  • If the pointer lands on a Multiplier wedge, that value is added to the Multiplier total.
  • Once a value has been awarded, the wedge converts to a “Start Bonus” wedge, and the player spins again.
  • The player continues spinning until landing on a “Start Bonus” wedge, at which point the Free Spin Feature begins.
  • Credits bet and lines played are the same as the game that triggered the feature.
  • Additional Free Spins can be won during Free Spins.
  • When three or more Mystery Mine symbols land on-screen during Free Games, the player is awarded an additional number of Free Games equal to the number that started the feature, at the same multiplier.

Mystery Replacement Feature Rules

  • All changed symbol positions on all reels transform into the same symbol.

Max Win Game Rules

  • The maximum potential win amount is limited to 10,400× bet in both the base game and Free Spins.
  • If the total win of a round reaches the maximum potential win amount, the round immediately ends, the win is awarded, and all remaining Free Spins are forfeited.

Return to Player

  • The RTP is shown in-game.

Mystery Mine Demo Mode & Free Play Explained

A common way for players to explore a slot is by searching for a Mystery Mine demo or Mystery Mine free play option. Since this website does not offer demo or free play versions, we’ve created this page to give you the same type of insight in a different way.

Here, you’ll find a clear outline of how the game is structured, including its main features, bonus rounds, and the role of special symbols.

This overview provides the knowledge you could gain from trying a Mystery Mine demo version, making it easier to understand the experience in advance.


*All values (Bet Levels, Maximum Wins etc.) mentioned in relation to this slot game are subject to change at any time. Game features mentioned may not be available in some jurisdictions.