Brinestack
Drag one deck. Save the whole stack.
Brinestack is tower defense where the tower moves. Your weapons ride on a stack of decks towed along the sea floor. Sea creatures hit it at four heights, and you drag the right deck to meet them while the dive runs.
Coming soon to the App Store
12 dives free · no ads · no tracking · plays offline
Your tower never had to stay put.
Builds lock at the start
Most tower games freeze your setup before the wave arrives. When the wave changes shape, you watch.
The sea hits every height
Jellyfish sting the top deck while your Flak sits at the bottom. A sea star climbs past a Clamp two slots too low.
Move any deck, any time
Drag a deck to any slot mid-dive. Decks in the middle mend while nothing hits them, so where you put them matters twice.
- HIGHJellyfish sink onto the top deck
- MIDEels strike the middle deck
- FACESea stars climb the stack
- LOWCrabs and hermits hit the bottom deck
What you get
Six weapons, each with a reach
Harpoon, Clamp, Flak, Mortar, Coil and Fan each cover only some heights. Spend the pearls you collect mid-dive to repair a deck (Patch) or make it fire faster (Overdrive).
36 dives, three seas
The Shallows, Kelp Deep and the Trench, each deeper and busier. Between dives, spend your shells at the Dock on tougher decks, faster restacks and extra starting pearls.
Fair by design
No ads, no account, no tracking. Your progress stays on your phone, and it plays offline.
How to play
- Read the sonar.The SONAR panel counts creatures by the height they attack: high, mid, face and low.
- Drag a deck to the threat.Put the weapon that reaches that height where the hits land. Keep a hurt deck in the middle so it mends.
- Crack every nest.Clear the dive, earn stars and shells, then refit your decks at the Dock.
Price
| The ShallowsDives 1–12, four of the six weapons and the Dock | Free |
|---|---|
| All SeasOpens Kelp Deep and the Trench: 24 more dives. One time. | $3.99 |
| Supply CrateOptional booster pack: 5 Depth Charges and 5 Second Winds | $0.99 |
| Supply HoldOptional booster pack: 15 Depth Charges and 15 Second Winds | $2.99 |
US prices; the App Store shows yours. Bought before? Settings → Restore Purchases.
Questions
What does it cost?
The Shallows, dives 1–12, are free. All Seas is a one-time purchase ($3.99 in the US) that opens Kelp Deep and the Trench: 24 more dives. Supply Crate ($0.99) and Supply Hold ($2.99) are optional booster packs.
Are there ads?
No. There are no ads and no ad networks in the game.
Does it need the internet?
No. The game contacts the App Store only to show prices, make purchases and restore them.
Where is my progress saved?
On your device only. Purchases come back with Restore Purchases on any device with the same Apple account.
What do the boosters do?
A Depth Charge clears every creature in reach of the stack. A Second Wind rebuilds your decks once after a Hull Breach. You earn some by playing; packs are optional.
Which devices does it run on?
iPhone, with iOS 15 or later. Brinestack is coming soon to the App Store.