Our review of Mr. Driller cuts through the marketing and looks at what matters: how it plays and how it pays. Ainsworth are the team behind it, tuning the title for high variance, with a published RTP of 94.7%. If everything lines up, Mr. Driller can pay up to 20,000x your bet. Expect a hit frequency around 30%, which sets the rhythm of play. It's built with crisp artwork and atmosphere and plays out on 25 paylines across 5 reels. Let's break down what works and what doesn't.
Written by Daniel Chen · Last updated: February 2026
Mr. Driller comes to us from Ainsworth, given an engaging visual treatment and powered by 5 reels and 25 paylines. The result is a high-variance maths model paired with an RTP of 94.7%.
The mechanics are what make Mr. Driller interesting. Look out for scatter symbols that unlock free spins and extra bonus rounds. With high variance, this one is aimed at players who can ride out the swings for the top wins. All told, it's a solid entry in the Ainsworth catalogue.
The RTP of 94.7% 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.
High volatility means longer gaps between wins, but when wins do land, they can be significantly larger. A bigger bankroll and patience are recommended for this type of slot.
About 1 in 3 spins results in a win. This is a moderate hit frequency that balances win frequency with payout size.
Mr. Driller 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
Mr. Driller by Ainsworth is a solid offering that delivers good entertainment value. The 94.7% RTP combined with high volatility creates a well-balanced gaming experience.