Reactor 2: Nuclear Tycoon
Contains adsIn-app purchases
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3.66K reviews
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100K+
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About this game
The nuclear idle tycoon simulator is back — and it's free.
Build your own power company from the ground up. Manage heat, optimize production, and grow a massive energy empire. In Reactor 2, you don't just construct power plants — you power an entire evolving city.
Master the system, discover your best strategy, and scale your profits to become a true industrial billionaire.
⚡ BUILD, POWER, AND EXPAND
Start small with basic wind turbines and grow into a high-efficiency nuclear power network.
Your mission is simple — supply energy to the city. Your challenge? Control the heat.
• Produce heat with diverse power sources
• Convert heat into electricity for the city
• Cool your systems to avoid production shutdowns
Balance everything perfectly to achieve maximum efficiency.
😌 RELAXED STRATEGY, NO PUNISHMENT
Reactor 2 is an idle clicker game built for thinkers, not masochists.
Your reactors never explode or reset your progress — they simply pause and cool down. This creates a no-loss, strategy-first experience where you experiment, optimize, and build at your own pace.
🔬 RESEARCH THE FUTURE
Unlock dozens of technologies and push your power empire forward.
• Renewables: Solar, Wind, Hydro, Tidal
• Advanced Tech: Nuclear, Fusion, Arc Reactors
• Sci-Fi Tier: Antimatter, Black Hole Reactors, HyperSpace Core
Every upgrade deepens your strategy and multiplies your profits.
💡 WHY YOU'LL LOVE REACTOR 2
• Idle gameplay — earn offline, even when the app is closed
• Deep resource management, no internet required
• Expand your power grid across unique islands
• Complete quests, chapters, and story-driven challenges
• Free to play — download and start building today
🚀 NEW IN THE SEQUEL
• A living city that grows with your energy output
• Advanced quest system with chapters and rewards
• Crafted by an indie team — refined pixel art and smoother performance
Reactor 2 is the ultimate offline idle simulation game — nuclear strategy, construction management, and tycoon gameplay in one free pixelated package.
Build smarter. Optimize harder. Watch your empire grow.
Download Reactor 2 free — your nuclear tycoon journey starts today.
https://rsgapps.com/
rsg@rsgapps.com
Build your own power company from the ground up. Manage heat, optimize production, and grow a massive energy empire. In Reactor 2, you don't just construct power plants — you power an entire evolving city.
Master the system, discover your best strategy, and scale your profits to become a true industrial billionaire.
⚡ BUILD, POWER, AND EXPAND
Start small with basic wind turbines and grow into a high-efficiency nuclear power network.
Your mission is simple — supply energy to the city. Your challenge? Control the heat.
• Produce heat with diverse power sources
• Convert heat into electricity for the city
• Cool your systems to avoid production shutdowns
Balance everything perfectly to achieve maximum efficiency.
😌 RELAXED STRATEGY, NO PUNISHMENT
Reactor 2 is an idle clicker game built for thinkers, not masochists.
Your reactors never explode or reset your progress — they simply pause and cool down. This creates a no-loss, strategy-first experience where you experiment, optimize, and build at your own pace.
🔬 RESEARCH THE FUTURE
Unlock dozens of technologies and push your power empire forward.
• Renewables: Solar, Wind, Hydro, Tidal
• Advanced Tech: Nuclear, Fusion, Arc Reactors
• Sci-Fi Tier: Antimatter, Black Hole Reactors, HyperSpace Core
Every upgrade deepens your strategy and multiplies your profits.
💡 WHY YOU'LL LOVE REACTOR 2
• Idle gameplay — earn offline, even when the app is closed
• Deep resource management, no internet required
• Expand your power grid across unique islands
• Complete quests, chapters, and story-driven challenges
• Free to play — download and start building today
🚀 NEW IN THE SEQUEL
• A living city that grows with your energy output
• Advanced quest system with chapters and rewards
• Crafted by an indie team — refined pixel art and smoother performance
Reactor 2 is the ultimate offline idle simulation game — nuclear strategy, construction management, and tycoon gameplay in one free pixelated package.
Build smarter. Optimize harder. Watch your empire grow.
Download Reactor 2 free — your nuclear tycoon journey starts today.
https://rsgapps.com/
rsg@rsgapps.com
Build your energy sector empire! Manage heat, power the city & become a magnate.
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Ratings and reviews
3.48K reviews
Dsuable
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October 28, 2026
Devs are active, wrote a few problems here, they fixed it. But another problem came up with the update thar fixed the problems I listed here, reported it, they said they found the issue and are going to fix it. And as a courtesy, they sent me a code for lifetime VIP purchase. Was expecting to be disappointed in the end after I wrote my firsr review, but the devs humbled me beautifully. Thank y'all!
RSGapps - Idle Tycoon Games
October 28, 2026
Thanks for the detailed feedback! The latest version performs much better with large layouts. You're right about the badge: during Rush Hour the small packs grow, but the badge doesn't change. I've noted it.
Richard Cox
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November 9, 2026
Very addictive and fantastically designed. This is the kind of game that enters your dreams at night after playing for a while. The developer is actively listening and responding to community feedback, showing a great dedication to this project.
RSGapps - Idle Tycoon Games
October 21, 2026
Thanks for the specific feedback, we understand how frustrating that is when offers are rare. We'll fix it so an accidental tap outside the buttons no longer closes the offer.
Alex Patrevito
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September 15, 2026
Game has never forced a single ad after over a week of play without the ad free upgrade. The pace is very nice, with enough ways to speed things up w/o spending a lot. Game layout is fantastic and intuitive. I like the time estimate it gives you until you get enough money/research points the upgrades, which helps me plan what to level up. I play a few minutes at a time here and there throughout the day, which I find nice. No pushy events or ads. The ad free upgrade is worth it, it speeds it up.
6 people found this review helpful
RSGapps - Idle Tycoon Games
October 21, 2026
Thank you so much for such a detailed review! ❤️ Glad the time estimates help you plan ⚡😊
What’s new
• Two new reactors: Kaiju Bio Reactor and Pixel Core, a new generator, plus new City levels and chapters.
• Smoother start-up.
• Cloud save fixes and minor improvements.
• Smoother start-up.
• Cloud save fixes and minor improvements.
App support
About the developer
Robert Grzybek RSG
rsg@rsgapps.com
6A-2 Ul. Bolesława Chrobrego
77-200 Miastko
Poland
+48 662 064 618
