If you're trying to work out whether Mysteries of Karnak is worth your time, this hands-on review breaks it down. Built by Merkur, it lands as a slot with a very high volatility profile and 95.98% RTP. Top wins are capped at 5,000x your stake, a healthy ceiling worth chasing. It's built around an egyptian theme and plays out on 5 reels and 20 paylines. It first went live in 2020 and still earns its place today. The full verdict is below.
Written by Michael Torres · Last updated: January 2026
Mysteries of Karnak comes to us from Merkur, themed around egyptian and powered by 5 reels and 20 paylines. The result is very high volatility paired with 95.98% RTP.
The mechanics are what make Mysteries of Karnak interesting. Look out for scatter symbols that unlock free spins and extra bonus rounds. With very 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 Merkur catalogue.
At 95.98%, 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.
Mysteries of Karnak 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
Mysteries of Karnak by Merkur is a solid offering that delivers good entertainment value. The 95.98% RTP combined with very high volatility creates a well-balanced gaming experience.