Idle Reactor is a click-and-wait power plant simulator. Charge your core, automate production with upgrades, and grow your reactor through nine distinct tiers — each one a real 3D structure that gets bigger, brighter, and more powerful.
Click the core to generate Energy by hand. Every click matters early on — and scales with your upgrades forever.
Spend Energy on coolant loops, turbines, and containment arrays. They keep generating Energy even while you're away.
Cross Energy thresholds to unlock new reactor tiers. Each tier is a different 3D structure with its own multiplier.
Reset everything for permanent Prestige bonuses, and start your climb again — faster than before.
No account needed — progress is saved to this browser.
Start Reactor