You start with 1,000 credits, a population that thinks fire is impressive, and a planet that needs adult supervision. Buy shares in food, tools, factories, fusion. Survive plagues, bubbles and the occasional AI uprising. Share the planet with a rival civilization that is also having opinions about everything. A free browser civilization strategy game — no download, no sign-up, no excuses.
You are the planetary investment commander, which sounds more dignified than it is. You start with 1,000 credits, a tribe that has just discovered fire, and zero board oversight. Buy shares in sectors. React to events. Try not to bankrupt the species.
The game runs in turns. Each turn: prices wobble, a new event happens to you, and the population either multiplies or has a stern word with management. Your Civilization Stock Index tracks how the planet is doing overall. Reach the Space Age in fewer turns and you earn bragging rights. Take too long and history quietly forgets your name.
Buy and sell shares in things civilizations actually need: Food, Tools, Trade, Industry, Tech, Space. Each sector has a base price, a volatility, and a strong opinion about every event that fires. Prices move every turn whether you're paying attention or not.
A drought, a factory boom, an AI that wants a word. Every few turns an event fires with 2–3 choices. Each option lifts some sectors and sinks others. Whatever you happen to be holding will absolutely influence which option looks "rational." The game uses net-position weighting to spot manipulation — it doesn't flag every choice that helps a sector you own, only choices where the net gain on your total portfolio is positive. The market is doing the maths.
To unlock the next era you need three things at the same time: an Index above the threshold, a Net Worth above the portfolio gate, and a Population above the people gate. Two out of three is just an interesting story. Slip too low while stability or happiness collapses and you regress an era — taking 20% of the population with you, who will not be writing thank-you cards.
Stability is the silent score that keeps your civilization from staging a polite revolution. Bad event picks, market manipulation and burst bubbles all chip away at it. Below 50 you get the warning. Below 30 with a falling index, the lights go out. It heals at +0.5/turn — but when stability drops under 30, a Recovery Event arrives every few turns offering a way to claw back faster. Patience helps. Smart picks help more.
Every Next Turn click ticks the counter at the top. Reach the Space Age and that number becomes your final score — like golf, in space. Fewer turns = greater glory. Beat your previous best and lord it over your past self. We're keeping receipts.
A second civilization grew on this same planet. They call themselves The Procyon Hegemony and they are, broadly speaking, also doing fine. Most of the time they will not invade you, will not crash your market, will simply progress on their own schedule through the same five eras you do — and occasionally show up to propose a trade convoy, a joint research initiative, or a frankly suspicious offer to "share the river." How you respond changes them. Welcome their population and sign their treaties, and the Hegemony grows comfortable and slow. Sabotage their satellites and steal their patents, and you radicalize them. You won't see a number. You'll just notice that some runs they reach the stars before you and some runs they don't. But once an era, when they've drawn level, they stop being neighborly — and the Hegemony Gambit can strip your civilization back to the start of the age if you read it wrong. You'll be warned. Whether you listen is the game. Co-existence is the win; the rival is the company you keep — right up until it isn't.
No downloads. No sign-up. Name your planet, pick a currency, and start making decisions you can defend in a memo. Free to play.
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