Mjolnir has been catching plenty of attention, so we put it through its paces to see how it really holds up. JDB Gaming are the studio behind it, tuning the slot for a medium low-variance maths model, with a published RTP of 95.46%. Visually it's finished with a clean, modern look, with the action running on 10 paylines across 5 reels. Originally released in 2023, it has aged well. The maximum win sits at 5,000x, so there's serious upside on the table. Here's how it stacks up.
Written by Emma Roberts · Last updated: February 2026
Mjolnir is a slot game from JDB Gaming, given an engaging visual treatment. It runs on a 5-reel grid running 10 paylines with medium low volatility, and 95.46% RTP.
Where Mjolnir earns its keep is the feature set. Look out for scatter symbols that unlock free spins and extra bonus rounds. Thanks to its medium low variance, wins come often enough to suit casual, lower-risk play. Overall it's a well-rounded slot game that knows what it is.
At 95.46%, 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.
Medium-low volatility offers a good balance of regular wins with occasional larger payouts. Expect frequent hits with modest amounts, suitable for casual players who want low-risk entertainment.
About 1 in 3 spins results in a win. This is a moderate hit frequency that balances win frequency with payout size.
Mjolnir 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
Mjolnir by JDB Gaming is a solid offering that delivers good entertainment value. The 95.46% RTP combined with medium low volatility creates a well-balanced gaming experience.