Sphinx has been catching plenty of attention, so we put it through its paces to see how it really holds up. This is a IGT slot game, sitting firmly in the a very high-variance maths model bracket and paying back an RTP of 95.14%. The maximum win sits at 25,000,000x, so there's serious upside on the table. You get 10 paylines across 5 reels, all built with crisp artwork and atmosphere. It first went live in 2020 and still earns its place today. Here's how it stacks up.
Written by Daniel Chen · Last updated: January 2026
Sphinx comes to us from IGT. Presentation-wise it's given an engaging visual treatment, and it leans toward very high volatility at 95.14% RTP. Under the hood you'll find 5 reels and 10 paylines.
Where Sphinx earns its keep is the feature set. 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.
Sphinx 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
Sphinx 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.