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80%69880% positive reviews, Very Positive across 698 reviews·Realistic · First-Person
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A satirical nuclear reactor management game about profit, control and the art of the acceptable catastrophe.
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MESOZOIKUM
SteamAbout MESOZOIKUM
Mesozoikum: Reactor Civilization
Profit. Power. Consequences.
Take control of an aging nuclear reactor in a world where profit matters more than safety and statistics can always be adjusted.
CONTROLLED MELTDOWN is a satirical nuclear management game where you oversee every aspect of a power plant: neutron density, temperature, cooling systems, power grids, personnel — and most importantly, how the truth is handled when things go wrong.
A small mistake? → Incident. Ignored warnings? → Partial meltdown. A really bad day? → Build a sarcophagus.
As long as the money keeps flowing, everything is… acceptable.
☢️ Core Features
🔧 Deep Reactor Management
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Control rods, cooling loops, emergency power, venting & boric acid systems
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Manual and automatic systems with real, cascading consequences
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Balance stability, output and risk in real time
🚨 Crisis & Disaster Handling
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Respond to incidents, system failures and core meltdowns
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Decide when to intervene — and when to let things escalate
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Not every disaster ends the game… some are just accounted for
🧠 Moral Choices Without Morality
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Safety vs. profit
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Personnel vs. expenses
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Honesty vs. trust
Every decision affects reactor stability, public perception and your final balance sheet.
☭ Dark Humor & Political Satire
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Sarcastic awards for “successful” catastrophes
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Absurd dialogue with safety regulators
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A world where loyalty is praised and consequences are negotiable
🏗️ Infrastructure & Expansion
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Build fire brigades, generators, enrichment facilities and control rooms
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Upgrade systems to prevent — or survive — failure
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The reactor grows more complex… and more dangerous
🏁 Multiple Outcomes
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Stable operation
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Controlled catastrophe
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Total systemic collapse
🏅 Awards
Golden Comrade Star “Hero of the Controlled Catastrophe.”
Silver Comrade Star “Profit Despite Fireball.”
Bronze Comrade Star “Avoided Unnecessary Catastrophes.”
⚠️ Disclaimer
This game is satire. All depicted disasters, decisions and systems are fictional. Any resemblance to real-world events is purely coincidental. Probably.
Steam data © 2026 Valve Corporation. Trademarks are property of their respective owners.
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