Mystery Express has been catching plenty of attention, so we put it through its paces to see how it really holds up. Built by IGT, it lands as a slot with very high volatility and an RTP of 95.14%. It first went live in 2020 and still earns its place today. Visually it's built around an adventure and mystery theme, with the action running on 5 reels and 20 paylines. If everything lines up, Mystery Express can pay up to 25,000,000x your bet. The full verdict is below.
Written by Michael Torres · Last updated: January 2026
Mystery Express comes to us from IGT, dressed up with an adventure and mystery theme. It runs on a 5-reel grid running 20 paylines with very high variance, and an RTP of 95.14%.
The mechanics are what make Mystery Express 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 IGT catalogue.
At 95.14%, 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.
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.
Mystery Express 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
Mystery Express by IGT is a solid offering that delivers good entertainment value. The 95.14% RTP combined with very high volatility creates a well-balanced gaming experience.