Reactor 2: Nuclear Tycoon

Contains adsIn-app purchases
780 reviews
Content rating
Everyone
100K+
Downloads
Content rating
Everyone
In-Game Purchases
Learn more
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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 energy sector empire! Manage heat, power the city & become a magnate.
Updated on
Aug 11, 2026
Available on
Android, Windows

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • This app may share these data types with third parties
    Location, Financial info and 2 others
  • This app may collect these data types
    Location, Financial info and 2 others
  • Data is encrypted in transit
  • You can request that data be deleted

Ratings and reviews

746 reviews
Kanxervero
August 1, 2026
This is by far the best monetarily manager game I've seen for mobile as you don't need to buy anything and the ads are for your benefit and limited. Better yet, if you do want to buy something the prices aren't ludicrous like other games, 2 dollars for a bonus pack is nothing. The game is what idle games should have been and honestly I'm happy with it. The only thing that could be called a con is the wait time for upgrades and obstacle clearing as it ramps up fast in cost and time.
2 people found this review helpful
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hendi waskito
July 25, 2026
its a simple and easy. perfect game to pass the time but the annoying part is when moving the building or the stuff. for example, when I try to move a generator, it keeps saying can't move building because the building overlap the other one. can you add like an indicator when we try to move a building so I'm sure I'm in the right spot and overlap other building
1 person found this review helpful
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RSGapps - Idle Tycoon Games
July 26, 2026
Hi! I've added new mode for moving buildings without dragging them. Just select a building, tap Move and place it wherever you like. It this better now?
Mohammad Kahe
August 2, 2026
One of the best tycoon games I've ever played! The gameplay is fun and addictive. A special thanks to Robert, the developer, for his incredible support. He personally helped me recover my save on a new phone, created a test version, investigated the issue, and stayed in contact until everything was fixed. I've never seen support like this before. Highly recommended!
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What’s new

- Bug fix: some buildings were not visible on the map and were not functioning correctly.
- New late-game buildings: Flux Capacitor Reactor, Doomstar Reactor, Generator, and Heat Sink.
- New Research Levels.
- Improved overall game performance.
- Potato Mode is now significantly faster.
- Minor fixes and improvements.