Every load has a dock.
A logic puzzle about planning deliveries: combine matching cargo, choose where it lands, and fill every dock exactly with nothing left on the quay. 204 harbors to solve.
Free to start on Android · No ads, ever.
No ads
No timer
204 harbors to solve
Offline play
How it plays
Every load has a dock.
Harborline is a finite logic puzzle. Each harbor starts with a fixed set of cargo and up to four docks, A to D, and every dock asks for one exact load. Two matching loads side by side combine into the next larger load on whichever of the two spots you choose. Fill every dock exactly and clear the quay to win. Nothing refills, nothing falls and there is no timer, so a load sent the wrong way can strand a dock — and Undo is always free. 204 levels across thirteen chapters run from small 4×4 harbors with two docks to 7×7 ports with four, and every level ships 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
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.
Clean Deliveries
Solve a level without hints or undos to earn a Clean Delivery, replay any cleared level to improve it, and see where you stand among the Harbormasters.
No ads. No timers. No coin economy.
Harborline is funded by one fair unlock, not by interruptions. There are no ads, no energy meters, no paid retries and no random rewards — and the app carries no advertising SDK at all.
Why it exists
Built for a reason.
Most tile games are endless: you play until the board jams. Harborline is finite and exact. Every harbor has a right answer and a fixed supply of cargo to reach it with, so each move is a decision you can think through.
Made for harborline is for people who like a puzzle with a solution — crossword, nonogram and logic-grid players — and for anyone who wants a calm game that respects their time and never asks them to wait.
Inside the app
Real screens from Harborline.
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
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Ready when you are
Play Harborline.
Free to start on Android, with no ads, ever.
