Free underwater games on Android cover survival on the open sea, submarine battles, treasure diving and aquarium match-3 puzzles. Four listings here say they play offline, including Raft Survival and Ocean Puzzle World. Four show no ads label, and every game has in-app purchases.
Holding your breath is optional. Underwater games let you swim through wrecks, steer a submarine or build a reef from your sofa, with no wetsuit and no cold ears.
I checked the Google Play listing for each game and noted who makes it, how many installs it has, the ads and in-app purchases labels, its content rating and anything it says about offline play. They're in no particular order.
The ten range from a cute otter hunt to an alien survival game rated Teen, so the rating column in the table is worth a glance before anyone downloads.
Deep sea games compared
| Game | Developer | Google Play installs | Ads / in-app purchases | Offline wording on the listing |
|---|---|---|---|---|
| Raft Survival - Ocean Nomad | Survival Games Ltd | 100M+ | Contains ads, in-app purchases | 'Play with no wifi or internet connection' |
| WORLD of SUBMARINES: Navy PvP | ForgeGames Mobile | 10M+ | Contains ads, in-app purchases | No offline claim on the listing |
| World of Water | StarFortune | 5M+ | No ads label, in-app purchases | No offline claim on the listing |
| Underwater Survival: Deep Dive | Fun Games World RA | 1M+ | Contains ads, in-app purchases | No offline claim on the listing |
| Treasure Diving | Mobitale Limited | 1M+ | Contains ads, in-app purchases | 'Treasure Diving can be played offline' |
| Top Fish: Ocean Game | StarFortune | 1M+ | No ads label, in-app purchases | No offline claim on the listing |
| Dinosaur Ocean Explorer Games | Yateland Games for kids | 1M+ | No ads label, in-app purchases | 'Play without internet' |
| Otter Ocean - Treasure hunt | Finifugu Games | 1M+ | Contains ads, in-app purchases | No offline claim on the listing |
| Aquarium Crush | TG Inc. | 100K+ | No ads label, in-app purchases | No offline claim on the listing |
| Ocean Puzzle World | mobirix | 100K+ | Contains ads, in-app purchases | 'Play the game without an internet connection!' |
Ten games below the surface
Raft Survival - Ocean Nomad
You're adrift on a raft, crafting tools, fishing and fighting off whatever lurks below. Survival Games Ltd says it plays without wifi, and it has more than 100M installs.
WORLD of SUBMARINES: Navy PvP
Take the helm of a submarine and fight other captains in real time. It's an online battle game rated Everyone 10+, so it needs a connection and suits older players.
World of Water
Starting near the Great Barrier Reef, you rebuild your home and explore a sea full of hidden treasure and stories. StarFortune's listing shows no ads label.
Underwater Survival: Deep Dive
A survival game on an alien ocean planet, with open waters to explore and hostile creatures to avoid. It's rated Teen, the highest rating on this page.
Treasure Diving
Dive for sunken ships, ancient cities and treasure in a colourful adventure. Mobitale's listing says it plays offline, but you'll need a connection to save progress and swap gifts with friends.
Top Fish: Ocean Game
The second StarFortune game here. You choose one of three Lords to side with and restore a faded reef, calling on sea life to help.
Dinosaur Ocean Explorer Games
Yateland's game is made for children and mixes exploration with simple science, from polar seas to mangroves. Its listing says it has no third-party ads and plays without internet.
Otter Ocean - Treasure hunt
A cute scavenger hunt to find the members of an otter family. Finifugu Games keeps things sweet and light, which makes it a nice one for younger players.
Aquarium Crush
Match-3 puzzles let you collect rare fish and decorations for your own aquarium. TG Inc.'s listing shows no ads label, and it's rated Everyone 10+.
Ocean Puzzle World
A fantasy puzzle world under the sea, where you match pieces and discover hidden treasure. mobirix says offline play is available.
Survival, battle or treasure hunt?
Raft Survival and Underwater Survival are about staying alive: gathering supplies, crafting and avoiding danger. WORLD of SUBMARINES is the battle game, played live against other people. Treasure Diving, World of Water and Top Fish lean towards exploring and rebuilding.
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At the gentle end are Otter Ocean, Aquarium Crush, Ocean Puzzle World and Dinosaur Ocean Explorer Games. They're quieter, with puzzles or simple exploring instead of threats.
Ages and labels below the waves
- Rating: four are rated Everyone, five are Everyone 10+ and Underwater Survival is Teen.
- Ads: six show a Contains ads label. World of Water, Top Fish, Dinosaur Ocean Explorer Games and Aquarium Crush don't.
- In-app purchases: all ten have them.
For younger children, Dinosaur Ocean Explorer Games and Otter Ocean are the clearest fits. Even so, a rating label isn't a promise, so play together first and switch on approval for in-app purchases in Google Play.
Diving together with friends
Most underwater games are solo adventures. WORLD of SUBMARINES is the main exception, and Treasure Diving lets you swap gifts with friends. If you'd rather play side by side in the same room, my guide to Android co-op games to play with mates nearby has games built for that.
Older teens who enjoy the tense side of survival games might like teaming up for something spookier. Here are co-op horror games to play with friends, with notes on which ones suit nervous players.
And for a screen-free version of the same teamwork, cooperative board games have everyone working together against the game rather than each other.
Which ones work out of signal
Raft Survival, Treasure Diving, Dinosaur Ocean Explorer Games and Ocean Puzzle World all say they play offline. Treasure Diving adds that you'll need a connection to save progress, so reconnect before you close it. WORLD of SUBMARINES needs other players online, so it's no use on a plane.
If you want the full set, start at the Free Games to Play Offline and Online: Every Guide in One Place (2026).
Frequently asked questions
Are there free underwater games for Android?
Yes. All ten games on this page are free to install from Google Play.
Which underwater games work offline?
Raft Survival - Ocean Nomad, Treasure Diving, Dinosaur Ocean Explorer Games and Ocean Puzzle World have offline wording on their listings.
Is there an underwater game for young kids?
Dinosaur Ocean Explorer Games is made for children and rated Everyone, and Otter Ocean is a gentle treasure hunt.
Which underwater games have no ads label?
World of Water, Top Fish: Ocean Game, Dinosaur Ocean Explorer Games and Aquarium Crush.
Can you play an underwater game with friends?
WORLD of SUBMARINES: Navy PvP is played against other people online, and Treasure Diving lets you swap gifts.
What's the most popular underwater game here?
Raft Survival - Ocean Nomad, with more than 100M installs on Google Play.
