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rapid growth harbor port city power-balance builder
Old Mega Harbor Port City is a compact city builder: place utilities and zones on a small grid, keep power and water positive, and collect tax to reach the goal.
Select a building from the shop bar — start with a ⚡ power plant and 💧 water tower. Tap an empty plot to place it; the cost is spent and a timer starts.
Add houses and shops only while your power and water meters stay positive. Tap a ready building (🪙) to collect its tax income, then reinvest.
• Zone Dock Homes, Trade Towers, Container Yard and more on a 6×5 grid
• Rapid Growth economy — its own build costs, speeds, yields and tax goal
• Power ⚡ and water 💧 balance gates your tax income
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Free in your browser — no download, no sign-up.
Play Free Now →