Welcome to our deep dive on Crystal Miners — the demo, the maths, and whether it earns a spot in your rotation. Built by Apollo Games, it lands as a title with very high volatility and a return-to-player rate of 99%. If everything lines up, Crystal Miners can pay up to 12,000x your bet. You get a 5-reel grid running 40 paylines, all wrapped in polished, characterful visuals. Dating back to 2018, it remains a regular pick. Let's break down what works and what doesn't.
Written by Sophie Williams · Last updated: March 2026
Crystal Miners comes to us from Apollo Games, finished with a clean, modern look and powered by a 5-reel grid running 40 paylines. The result is very high volatility paired with 99% RTP.
The mechanics are what make Crystal Miners interesting. Look out for scatter symbols that unlock free spins and extra bonus rounds. The very high volatility means patience is rewarded — expect quiet spells broken by bigger hits. All told, it's a solid entry in the Apollo Games catalogue.
At 99%, this slot offers an excellent return to player rate, well above the industry average of ~96%. This makes it one of the more generous slots available in terms of long-term payout potential.
Very high volatility delivers the most extreme payout profile — long dry spells punctuated by potentially massive wins. Only recommended for experienced players with substantial bankrolls and high risk tolerance.
About 1 in 3 spins results in a win. This is a moderate hit frequency that balances win frequency with payout size.
Crystal Miners 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
Crystal Miners by Apollo Games is a solid offering that delivers good entertainment value. The 99% RTP combined with very high volatility creates a well-balanced gaming experience.