Our review of Diamond Mystery - 81 Boosting Jokers cuts through the marketing and looks at what matters: how it plays and how it pays. This is a Greentube game, sitting firmly in the a medium low volatility profile bracket and paying back 95.48% RTP. Dating back to 2024, it remains a regular pick. Top wins are capped at 5,000x your stake, a healthy ceiling worth chasing. It's leaning into a fruit aesthetic and plays out on 4 reels and 10 paylines. But is it actually worth playing? Read on.
Written by Sarah Mitchell · Last updated: February 2026
Diamond Mystery - 81 Boosting Jokers comes to us from Greentube, dressed up with a fruit theme. It runs on 10 paylines across 4 reels with a medium low volatility profile, and 95.48% RTP.
The mechanics are what make Diamond Mystery - 81 Boosting Jokers interesting. Look out for scatter symbols that unlock free spins and extra bonus rounds. Thanks to its medium low variance, wins come often enough to suit casual, lower-risk play. All told, it's a serviceable entry in the Greentube catalogue.
At 95.48%, the RTP is slightly below the industry average of ~96%. While this is typical for many popular slots, players should be aware of the slightly lower theoretical return.
Medium-low volatility offers a good balance of regular wins with occasional larger payouts. Expect frequent hits with modest amounts, suitable for casual players who want low-risk entertainment.
About 1 in 3 spins results in a win. This is a moderate hit frequency that balances win frequency with payout size.
Diamond Mystery - 81 Boosting Jokers features scatter symbols that can trigger free spins rounds. Landing the required number of scatter symbols anywhere on the reels activates the free spins feature, giving you extra chances to win without additional bets. During free spins, special modifiers may apply to boost your winning potential.
2.9 / 5 — Average
Diamond Mystery - 81 Boosting Jokers by Greentube provides a straightforward slot experience. While it may not break new ground, it offers medium low volatility gameplay that will appeal to certain player preferences.