Slots Like Underwater World: Medium Volatility Gameplay Alternatives

Underwater World is a Gameplay slot with an RTP of 98.14%, 5 reels and 3 rows and 15 paylines. Gameplay also makes Lucky Bomber, which share a similar build to Underwater World. Headline features cover free spins, gamble feature and increasing multipliers. In play that brings free spins multiplier. For the same Mermaid feel as Underwater World, look at Lucky Mermaid, Sea Sirens and Under The Sea. The 98.14% figure is measured over many thousands of spins. It strikes a middle ground, mixing a fair hit rate with the odd larger payout.

Underwater World casinos

Play Underwater World slot game at these top casinos.

Reviewed by Paul Stone
Published: March 2025

Games like Underwater World

Underwater World most similar slot games include Under The Sea, Sea Sirens, Pearl Lagoon and Razor Shark.

Under The Sea leans into a Mermaid theme. The reels form a 5×3 layout offering 30 paylines. The RTP is 96.40% and counts as medium-high overall. Treat it as a guide to long-run payback rather than a promise for any one session. Expect medium-low volatility here, so wins land fairly regularly and tend to be modest, which keeps sessions steady. On return it gives back slightly less than Underwater World, which runs 98.14%. On the bonus side you get free spins and increasing multipliers. You can bet from 0.02 to 150 per spin, leaving room for cautious and bigger play alike. It also draws comparisons with Fishin Frenzy. Fans of Underwater World should find plenty to like here.

Sea Sirens is a slot built by Novomatic. You spin a 5-reel, 3-row grid with 10 paylines in play. The RTP is 95.13% and counts as medium overall. Over thousands of spins that points to roughly that return, though a single visit can land well above or below it. The feature set covers free spins, gamble feature and increasing multipliers. Expect medium-low volatility here, so wins land fairly regularly and tend to be modest, which keeps sessions steady. On return it gives back slightly less than Underwater World, which runs 98.14%. Bets start at 0.4 and reach 100 a spin, covering most bankrolls. Players who like it tend to try Sirens Kingdom as well. Fans of Underwater World should find plenty to like here.

Developed by PlayNGo, Pearl Lagoon carries a Fish theme. The reels form a 5×3 layout offering 20 paylines. On the bonus side you get free spins, gamble feature and increasing multipliers. Specific touches include rtp range. Stakes run from 0.2 up to 100 a spin, so it suits both small and larger budgets. Return to player sits at 94.83%, placing it in the medium-low bracket. As ever, that is a theoretical average measured over a huge number of spins, so short sessions vary. On return it gives back slightly less than Underwater World, which runs 98.14%. Expect high volatility here, so the pace favours larger, less frequent wins, so sessions can run hot and cold. Players who like it tend to try Sharky as well. Choose it if you enjoyed Underwater World but want bigger swings.

Razor Shark is a slot built by Push Gaming. You spin a 5 reel, 4 row grid with 20 paylines in play. Return to player sits at 96.7% (variable configs down to 90.52% at some operators, check before playing), which is high for the market. Treat it as a guide to long-run payback rather than a promise for any one session. Bets start at £0.10 and reach £100.00 a spin, covering most bankrolls. Gameplay extras run to free spins, expanding wilds, additional paylines, increasing multipliers and mystery feature. Look out for additional free spins, free spins multiplier and mystery symbol. It plays at very high volatility, which means wins are rarer but can be large, so the balance tends to swing hard and patience helps. It also draws comparisons with Reel Em In Lobster Potty and Reef Run. It sits close to Underwater World in feel, making it a natural follow-on.

Slots similar to Underwater World

Underwater World is firstly an Undersea themed online slot with secondary themes of Mermaid themes.

Best Undersea themed slots

Underwater World is a Undersea themed slot game. Similar Undersea themed slots include Octopays, Sea Hunter, The War Of The Worlds and Razor Shark.

Gameplay slots like Underwater World

Underwater World was developed by Gameplay. It’s a medium-volatility game. The top win is worth up to 750,000x your stake. It plays out over 5 reels with 15 paylines. If Underwater World is your kind of slot, the Gameplay slots below are a good place to look next.

The best Gameplay slots, these slot games are all made by the same producer as Underwater World and the slot games are Lucky Bomber.

The numbers behind Underwater World

We’ve summarised the key info for Underwater World in the table below.

Underwater World screenshot

Games offering the same features as Underwater World

Underwater World has bonus features including: Free Spins, Gamble Feature and Increasing Multipliers.

Slots with Free Spins

The top matching slots with Free Spins are Shogun Of Time, Wild Huskies, Jolly Rogers Jackpot and Outta Space Adventure.

Online slots with Gamble Feature

The top matching slots with Gamble Feature are In Jazz and Satoshis Secret.

Games with Increasing Multipliers

Other matching slots with Increasing Multipliers are In Jazz and Satoshis Secret.

Underwater World slot sites FAQs

Underwater World Pros and Cons

A quick look at the main pros and cons of Underwater World, based on its RTP, volatility, features, ranking and gameplay.

Pros

• Player-friendly 98.14% return, near the top of the range
• Includes a free spins feature
• A huge 750,000x ceiling
• Gameplay adds multipliers that climb as you play

Cons

• Ranks well down our overall list (#3,584 of 4,200+)
• The mermaid and undersea theme won’t be for everyone
• No progressive jackpot on offer
• A higher £1.5 minimum stake than some rivals