🏗️ Old Twin Steel Works City

Welcome, mayor. Old Twin Steel Works City needs power, water and homes — in the right order. Build a power plant and a water tower first, then drop in houses and shops that draw on them for steady tax income. Grow income without browning out the city, bank the goal, and chase a higher score. It favours rapid growth: very cheap, very fast blocks with smaller payouts, rewarding quick, busy expansion. Old Twin Steel Works City is a free micro city-building game that plays instantly in your browser with one thumb — no download, no sign-up. Unlike a plain idle tycoon, here a resource puzzle sits underneath every tap: a house only pays tax while the power and water it needs are covered, so the fun is in the balancing act. Compact grids, clean vector zones, satisfying collect pops and a steadily rising tax goal make it a moreish "one more block" planner you can dip into any time. Thoughtful pacing keeps it relaxing at first and pleasantly challenging as you improve. Your progress is quietly saved in your browser between sessions, so it is always ready when you return.

How to play

• 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.
• Grow your tax income to the goal without letting a meter go negative.

Controls

One thumb: tap a building to select, tap a plot to place, tap a ready plot to collect. Tap 🔊 to mute. Touch or mouse — no keyboard needed.

Features

• Zone Worker Rows, Co-op Blocks, Foundry and more on a 4×5 grid
• Rapid Growth economy — its own build costs, speeds, yields and tax goal
• Power ⚡ and water 💧 balance gates your tax income
• Real-time production with tappable collect pops
• Particles, coin pops and WebAudio sound with a mute toggle
• Rising tax goals and a saved best score

FAQ