Cargo Puzzle · Free on Android
Merge matching cargo and fill every dock exactly.
No timer.
Nothing left over.
Combine matching cargo, choose where it lands, and fill every dock exactly with nothing left on the quay. 204 harbors to solve.
Not on iPhone yet. On an iPhone? Wordward and Decant are free on the App Store.
Free to start on Android · $4.99 one-time to own · No ads, ever.
No ads
No timer
204 harbors to solve
Offline play
How it plays
How Harborline plays.
Each harbor has a fixed set of cargo and up to four docks, and every dock wants one exact load. Two matching loads side by side combine on the spot you choose. Nothing refills and there is no timer, so plan the route — and Undo is always free. 204 levels, from 4×4 harbors to 7×7 ports, each with a verified solution.
- 204 harbors to solve, each with a verified solution
- Up to four docks, nine kinds of cargo, boards up to 7×7
- Clean Deliveries and the Harbormasters rankings
Inside the app
Real screens from Harborline.
The loop
Every run follows one honest loop.
- 01Open the next harbor
- 02Plan which loads go where
- 03Fill every dock
- 04Replay for a Clean Delivery
- 05Move on to the next chapter.
What is inside
Inside Harborline.
You choose where every load lands
Two matching loads that sit side by side combine into the next larger load, and it lands on the one you picked second. The same pair combined the other way feeds a different dock — and from the wrong harbor the level cannot be finished at all.
Finite, and it means it
An emptied spot stays empty. Nothing falls into the gap and nothing new arrives, so the cargo on the quay is all the cargo you will ever get. Every dock has to receive its exact load with nothing left over.
Nine kinds of cargo
Parcels become crates, crates become barrels, and on up through chests, containers, pallets, cargo towers and fuel tanks to a whole freighter. Each is drawn and colored so a busy 7×7 port reads at a glance.
A warning before you waste time
When a dock can no longer be reached, the harbor says so and offers Undo or Restart — it only says so when it is certain.
Fair unlocks
Play free. Own the rest when it earns it.
Free
$0
- The first 40 levels: three chapters and all four docks
- Unlimited hints, undo and restart
- No ads, no energy timers
Harborline Full Game Unlock
$4.99 one-time
- All 204 levels
- Premium harbor themes
- Bigger harbors up to 7×7
StackForge Play Pass
$2.99/mo or $14.99/yr
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Includes every StackForge game and One Good Thing; PlateStack is separate
No ads. No pay-to-win. No paid random rewards. No coin economy.
Our promise, in every StackForge game
No ads. Ever.
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- No videos between levels
- No watching ads for rewards
- No advertising code in any app
Our games pay for themselves with optional unlocks, never with your attention.
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Pay once, own it.
$4.99 unlocks a game for good. A subscription is only ever an option.
Ready when you are
Play Harborline.
Free to start on Android, with no ads, ever.