Harbor Stack: Cargo Builder

Control a harbor crane and pile cargo on a moving ship. Nail precise drops, build combo streaks, unlock achievements, and push your record higher every run.

Build the highest cargo stack in the harbor!

Harbor Stack is a fast-paced arcade game where precision and rhythm matter. Release swinging containers from a dock crane and carefully place them on a ship. The better your alignment, the taller your structure grows.

Gameplay

Containers swing back and forth above the deck.

Tap to release and land them on the pile.

Accuracy affects your combo and final score:

PERFECT — clean alignment, combo increases

GOOD — stable placement, combo continues

ROUGH — unstable drop, combo resets

Chain accurate drops to boost your score and climb higher with every container.

Each successful placement earns points based on:

current combo

difficulty level

placement accuracy

Difficulty modes

Easy — slower movement, relaxed pacing

Normal — balanced speed and challenge

Hard — faster swings and shifting deck

Round ends when

The stack loses balance

Cargo falls into the sea

A container misses the platform

Features

One-tap gameplay

Physics-driven stacking mechanics

Combo scoring system

Unlockable achievements

Short onboarding tutorial

Sound and vibration controls

Local progress saving

Drop cargo, keep the balance, and build your highest harbor stack.

How tall can you go?