Welcome to our deep dive on Diamond Miner DuoMax — the demo, the maths, and whether it earns a spot in your rotation. Built by Reflex Gaming, it lands as a slot with a medium high-variance maths model and an RTP of 94%. It's built with crisp artwork and atmosphere and plays out on a 5-reel grid running 15 paylines. If everything lines up, Diamond Miner DuoMax can pay up to 5,000x your bet. But is it actually worth playing? Read on.
Written by Rachel Kim · Last updated: March 2026
Diamond Miner DuoMax comes to us from Reflex Gaming, wrapped in polished, characterful visuals. It runs on a 5-reel grid running 15 paylines with a medium high-variance maths model, and a published RTP of 94%.
Where Diamond Miner DuoMax earns its keep is the feature set. Look out for scatter symbols that unlock free spins and extra bonus rounds. Its medium high variance balances steady wins with the odd larger payout. All told, it's a solid entry in the Reflex Gaming catalogue.
The RTP of 94% is below the industry average of ~96%. This is common for older slots or those with special features. The lower RTP may be offset by unique mechanics or higher maximum win potential.
Medium-high volatility means wins come less frequently but tend to be larger when they hit. Players should be prepared for dry spells between bigger wins, requiring a moderate bankroll.
About 1 in 3 spins results in a win. This is a moderate hit frequency that balances win frequency with payout size.
Diamond Miner DuoMax 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.
3.0 / 5 — Good
Diamond Miner DuoMax by Reflex Gaming is a solid offering that delivers good entertainment value. The 94% RTP combined with medium high volatility creates a well-balanced gaming experience.