Curious what Gates of the Underworld actually feels like to play? Here's our full, no-fluff take. Built by OctoPlay, it lands as a slot with medium variance and a published RTP of 95.52%. Visually it's built around a halloween theme, with the action running on 5 reels and 30 paylines. If everything lines up, Gates of the Underworld can pay up to 5,000x your bet. Originally released in 2025, it has aged well. So does it deliver? Let's get into it.
Written by Rachel Kim · Last updated: January 2026
At its core, Gates of the Underworld is a game produced by OctoPlay, leaning into a halloween aesthetic and powered by 5 reels and 30 paylines. The result is medium volatility paired with a published RTP of 95.52%.
The mechanics are what make Gates of the Underworld interesting. Look out for scatter symbols that unlock free spins and extra bonus rounds. The medium volatility strikes a middle ground that should suit most playing styles. Overall it's a well-rounded game that knows what it is.
At 95.52%, 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.
A balanced volatility profile with a mix of smaller frequent wins and occasional larger bonus payouts. Suitable for players who want steady action without extreme swings.
About 1 in 3 spins results in a win. This is a moderate hit frequency that balances win frequency with payout size.
Gates of the Underworld 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
Gates of the Underworld by OctoPlay is a solid offering that delivers good entertainment value. The 95.52% RTP combined with medium volatility creates a well-balanced gaming experience.