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Underwater Themed Slots — Free Demos
Browse 215 free Underwater themed slot demos. Instant play in your browser with full RTP, volatility, and bonus feature details.
215
Slots
95.4%
Avg RTP
100,000x
Max Win
Most games from Playtech (10 slots)
Showing 97–192 of 215
Amigo GamingGold of Mermaid
96% RTP
Med-Hi
Max Win1,200x
Free SpinsExpanding WildsRespins
Mega 7Golden Sea
96% RTP
High
Max Win~5,000xest.
Free Spins
WMSGoldfish
96% RTP
Med
Max Win10,000x
Free SpinsWildsBonus Round
PariPlayKing of the Trident
96% RTP
Med
Max Win~1,000xest.
Free Spins
AmaticLucky Shark
96% RTP
High
Max Win~5,000xest.
Free Spins
Endemol GamesMaidens of the Sea
96% RTP
Med
Max Win500x
High 5 GamesMajestic Sea 2
96% RTP
Med
Max Win1,000x
Free SpinsSticky WildsWilds
RTGMasks of Atlantis
96% RTP
Med
Max Win50,000x
Free SpinsCascading Reels
KA GamingMermaid Princess
96% RTP
Med
Max Win~2,000xest.
Free SpinsExpanding WildsWilds+1
Yggdrasil GamingNice Catch Doublemax
96% RTP
High
Max Win10,000x
Free SpinsBonus Round
InBet GamesOcean Pearl
96% RTP
Med-Hi
Max Win~3,000xest.
Free SpinsBonus Round
Rival GamingOcean Treasure
96% RTP
Med
Max Win~1,000xest.
Free SpinsBonus Round
CQ9 GamingParadise 2
96% RTP
Med
Max Win1,000x
SpinomenalPoseidon's Rising 15 Lines
96% RTP
Med-Hi
Max Win~3,000xest.
Free SpinsExpanding WildsStacked Wilds+1
SpinomenalQueen of Water
96% RTP
Med
Max Win2,000x
Free SpinsExpanding WildsWilds
AvatarUXReefPop
96% RTP
High
Max Win100,000x
Free SpinsBonus Round
Blueprint GamingRise of Atlantis II
96% RTP
High
Max Win1,000x
Free SpinsMultipliers
iSoftBetSea of Riches
96% RTP
Med
Max Win~2,000xest.
Free SpinsWildsCascading Reels
KA GamingSecret of Ocean 2
96% RTP
Med-Hi
Max Win1,000x
Free SpinsWildsScatters+1
High 5 GamesShark Shore
96% RTP
Med
Max Win500x
Free SpinsBonus Round
LIONLINENo Demo
No DemoTreasure Island
96% RTP
Med-Hi
Max Win~3,000xest.
Free SpinsExpanding WildsWilds+1
PlaylogicsTurtle Gems
96% RTP
Med-Hi
Max Win~3,000xest.
Free SpinsBonus Round
EndorphinaUndine's Deep
96% RTP
Med
Max Win~1,000xest.
Free SpinsBonus Round
OneTouchWealthy Sharks
96% RTP
High
Max Win999x
Free SpinsMystery Symbols
PlaytechNo DemoAquaman
95.99% RTP
Med
Max Win~1,000xest.
Free SpinsBonus Round
NetEntOcean's Treasure
95.99% RTP
High
Max Win18,000x
Free SpinsBonus Round
PlaytechAtlantis Queen
95.98% RTP
Med
Max Win~1,000xest.
Free SpinsWildsBonus Round
MerkurBeauty of Atlantis
95.98% RTP
Med
Max Win400x
Jackpot
OneTouchSea Treasure Deep Dive
95.98% RTP
Med
Max Win10,000x
Free SpinsBonus Round
PlaysonPearl Ocean: Hold and Win
95.95% RTP
Med-Hi
Max Win4,191x
Free SpinsJackpot
PariPlaySharknado
95.95% RTP
Med
Max Win~1,000xest.
Free SpinsBonus Round
OneTouchWild Waves Megaways
95.95% RTP
High
Max Win~10,000xest.
Free SpinsWildsMegaways+1
Probability Jones20,000 Leagues Under the Sea
95.94% RTP
Med
Max Win~1,000xest.
Free SpinsBonus Round
MerkurNo DemoOdyssee
95.93% RTP
Med
Max Win~1,000xest.
Free SpinsBonus Round
Plank GamingNeptune Rising
95.92% RTP
Med
Max Win75x
Free Spins
Max Win GamingSea Boat Adventure Megaways
95.86% RTP
Med
Max Win~2,000xest.
Free SpinsBonus Buy
Blue Guru GamesOctopus Armada
95.78% RTP
Med
Max Win~1,000xest.
Free Spins
AGSMermaid's Fortune
95.76% RTP
Med
Max Win300x
Free SpinsWildsJackpot+1
Blueprint GamingNo DemoDeep Sea Treasure
95.74% RTP
Med
Max Win~1,000xest.
Free SpinsBonus Round
Red Tiger GamingDragon King Legend of the Seas
95.74% RTP
High
Max Win1,800x
Free SpinsStacked WildsWilds
AllBetNo DemoUnderwater Fairies
95.72% RTP
Med
Max Win100x
Free SpinsBonus Round
Max Win GamingSea Boat Adventure
95.71% RTP
High
Max Win5,000x
Free Spins
MerkurVoodoo Shark
95.65% RTP
Med
Max Win~1,000xest.
Free SpinsBonus Round
Atomic Slot LabMermaid Pays 50
95.62% RTP
Med
Max Win~1,000xest.
Free Spins
PlaytechNeptune's Kingdom
95.58% RTP
Med
Max Win~1,000xest.
NovomaticSharky's Choices Win Ways
95.53% RTP
High
Max Win~5,000xest.
Free SpinsWilds
PlaytechOcean Frenzy
95.51% RTP
Med
Max Win~1,000xest.
Free SpinsCash Collect
GamesOSNo DemoAtlantis Dive
95.5% RTP
Med
Max Win~1,000xest.
Free SpinsBonus Round
AmayaNo DemoShark Bite
95.5% RTP
Med
Max Win500x
Free SpinsExpanding WildsWilds+1
MazoomaMighty Trident
95.49% RTP
Med
Max Win160x
Free SpinsBonus Round
PlaytechTriple Stop Mermaids Find
95.48% RTP
Med
Max Win~2,000xest.
Free SpinsSticky WildsWilds
NetEntNo DemoFishy Fortune
95.4% RTP
Med
Max Win~1,000xest.
Free SpinsBonus Round
Kalamba GamesDolphin Riches
95.34% RTP
Med
Max Win5,000x
Free SpinsJackpot
MicrogamingNo DemoBig Break
95.29% RTP
Med
Max Win~1,000xest.
Free SpinsBonus Round
ElaGamesIt's Shark Time Xmas
95.2% RTP
Low
Max Win~1,000xest.
Free SpinsJackpot
NovomaticMermaid's Pearl
95.17% RTP
Med
Max Win100x
Free SpinsBonus Round
NovomaticLord of the Ocean 10 Win Ways
95.15% RTP
Med
Max Win~1,000xest.
Free SpinsWilds
NovomaticDolphin's Pearl Deluxe 10
95.13% RTP
High
Max Win4,000x
Free Spins
Realistic GamesDouble Your Dough
95.11% RTP
Med
Max Win1x
Free SpinsBonus Round
ElaGamesIt's Shark Time
95.1% RTP
Low
Max Win9,375x
Free Spins
WorldMatchNo DemoRiches of the Sea
95.1% RTP
Med
Max Win~1,000xest.
Free SpinsBonus Round
BarcrestMermaid Queen
95.09% RTP
Med
Max Win~1,000xest.
Free SpinsBonus Round
NovomaticCaptain Venture Treasures of the Sea
95.07% RTP
Med-Hi
Max Win2,136x
SkywindMermaid Beauty
95.07% RTP
Med
Max Win~1,000xest.
Free SpinsScatters
PlaytechNo DemoOceanus Rising
95.05% RTP
Med
Max Win~2,000xest.
Free SpinsMultipliers
NovomaticDiamond Tales The Little Mermaid
95.04% RTP
High
Max Win50,000x
Free Spins
Blueprint GamingRise of Atlantis Legacy
95.02% RTP
High
Max Win10,000x
Free SpinsBonus BuyMultipliers+1
Ready Play GamingDeep Sea Dollars
95.01% RTP
Med
Max Win~2,500xest.
Free SpinsJackpot
NovomaticLord of the Ocean Magic
95.01% RTP
High
Max Win~5,000xest.
Free Spins
Caleta GamingWhale of Xtreme Fortune
95.01% RTP
Med
Max Win~2,000xest.
Free SpinsBonus Buy
Apollo GamesAtlantis
95% RTP
Med
Max Win9,000x
Free SpinsBonus Round
MazoomaNo DemoAtlantis Treasure
95% RTP
Med
Max Win~1,000xest.
Free SpinsBonus Round
Relax GamingDeep Descent
95% RTP
High
Max Win18,000x
Sticky WildsRespins
SkywindDolphin Delight
95% RTP
Med
Max Win~1,000xest.
Free SpinsBonus Round
NextGen GamingNo DemoEnchanted Mermaid
95% RTP
Med
Max Win~2,000xest.
Free SpinsExpanding WildsWilds+1
Blueprint GamingFishin' Frenzy Even Bigger Fish
95% RTP
High
Max Win10,000x
Free SpinsJackpot
Light & WonderHypercharged Temple of Atlantis
95% RTP
Med-Hi
Max Win~3,000xest.
Free SpinsWilds
AmayaNo DemoNeptune's Gold
95% RTP
Med
Max Win~1,000xest.
Free SpinsBonus Round
Realistic GamesNo DemoPirate Radio
95% RTP
Med
Max Win~1,000xest.
Free SpinsBonus Round
GamesOSSea of Gold
95% RTP
Med
Max Win~1,000xest.
Free SpinsBonus Round
NovomaticNo DemoSea Sirens
95% RTP
Med
Max Win~1,000xest.
Free SpinsBonus Round
Blueprint GamingBigger Catch Bass Fishing Rapid Fire Jackpots
94.99% RTP
Med-Hi
Max Win~5,000xest.
Free SpinsJackpot
WorldMatchMonkeys VS Sharks
94.95% RTP
Med
Max Win~1,000xest.
Free SpinsBonus Round
Rival GamingLost Secret of Atlantis
94.65% RTP
Med
Max Win1,000x
Free SpinsExpanding WildsWilds+1
SYNOT GamesMysterious Atlantis
94.65% RTP
Low
Max Win~500xest.
Wilds
WorldMatchNeptune's Secrets
94.62% RTP
Med
Max Win~2,000xest.
Free SpinsMultipliers
MobileFXThesaurus Of Atlantis
94.53% RTP
Low
Max Win1,266x
Free SpinsWilds
Inspired GamingBig Fishing Net Fortune
94.5% RTP
Med
Max Win100x
Bonus BuyWildsGamble Feature
Inspired GamingMermaid's Win & Spin
94.5% RTP
Med-Hi
Max Win1,000x
Free SpinsWildsScatters+2
Cayetano GamingRhino Rumble
94.46% RTP
Low
Max Win~500xest.
Free SpinsBonus Round
PlaytechLuminous Life
94.44% RTP
Med-Hi
Max Win~5,000xest.
Free SpinsRespinsJackpot+1
ElaGamesIt's Shark Time 2
94.4% RTP
Med
Max Win~1,000xest.
Free Spins
Qora GamesPearl Pursuit Hold & Win
94.26% RTP
Med-Hi
Max Win3,500x
Free SpinsBonus Buy
SpinomenalDeep Sea Fortune
94.24% RTP
Med
Max Win~2,000xest.
Expanding WildsWilds
Bullshark GamesHoly Heist
94.24% RTP
High
Max Win20,000x
Free SpinsBonus BuyExpanding Wilds+1
Atomic Slot LabShark Hunter
94.24% RTP
Med
Max Win50x
Free SpinsBonus Buy
