Your hand carries over
Unplayed cards stay in your hand between turns. Ballast cards reward holding on: they trigger at the start of every turn they sit in your hand, until you spend them for a burst.
Brassmere sank a century ago, but it still ticks. Build a deck, dive through its flooded fathoms and reach the Heart Engine in a roguelike deckbuilder where your hand carries over, and so does the pressure.
iPhone ยท iPad ยท iPhone Duo





Unplayed cards stay in your hand between turns. Ballast cards reward holding on: they trigger at the start of every turn they sit in your hand, until you spend them for a burst.
Play a Wind-up onto your spring track and it gains tension every turn. Release it early for a quick hit, or let it wind to the limit and resolve at full force.
Riveter, Tidewitch, Salvager, Lamplighter and six more to unlock. Each has a backstory, a map ability, two combat abilities and a starting deck built around a different way to dive.
Every fathom rolls two of six drowned terrains, from the Flooded Foundry to the Lightless Trench, each with its own monsters and guardians. On Abyss difficulty, the Heart Engine itself waits at the bottom.
Every dive opens with a boon of your choice, an action or a passive, and after each boss you choose again from boons drawn from the terrains you just dived. Six shrines offer one-time bargains with real costs attached.
Leaderboards and 70 achievements through Game Center on iPhone and iPad. No account to create: Game Center is optional, and the game is complete without it.
Six damage types, each with its own colour and symbol on every card: ๐จ Impact, โจ๏ธ Steam, ๐ Tide, ๐ฉ๏ธ Spark, ๐ฆ Rust and ๐ฏ Pierce. Monsters resist some and fear others.
Every run, setting and achievement is stored on your device. No connection needed to dive; online features are optional extras.
Three difficulties, seeded runs for sharing, a bestiary and a card compendium that fill in as you play.
Four divers are ready at the dock. The other six unlock by playing: trigger Ballast cards, release a wind-up at high tension, bring down the Kelp Regent and more.
A hull-welder who answers every problem with a rivet gun and a thicker plate.
She made a bargain with the Sunless Tide, and the Tide is still collecting.
A wreck-picker with a hook, a lamp and a long list of things that aren't nailed down.
Keeper of lamps nobody has lit in a century. She intends to light every one.
A diving suit that walked out of the trench. Nobody is sure what is inside.
A whaler from the Gull Spires who ran out of whales and found something bigger.
He keeps the great clocks of Brassmere. The biggest one is still running, and it's wrong.
A voice from the kelp arcades. Monsters come when she calls, and regret it.
She blows a conch and the reef answers: sharks, gulls, crabs, and one very young leviathan.
He fed the Heart Engine's boilers for thirty years. He knows exactly where it's weak.
One game for every screen. On iPad the board spreads out, with the enemy, your hero and your hand all in view at once.
Open iPhone Duo and the fight spreads across both halves: your hero faces the monster on one, while your hand and turn controls sit on the other, clear of the fold.
No ads, no tracking, no analytics SDKs. Runs, settings and achievements live on your device, there is no account to create, and Game Center is optional. Read the privacy policy.