Reactor 2: Nuclear Tycoon

Contains adsIn-app purchases
3.58K reviews
Content rating
Rated for 3+
100K+
Downloads
Content rating
Rated for 3+
In-Game Purchases
Learn more
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image

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/
[email protected]
Build your energy sector empire! Manage heat, power the city & become a magnate.
Updated on
Nov 9, 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 3 others
  • This app may collect these data types
    Location, Personal info and 4 others
  • Data is encrypted in transit
  • You can request that data be deleted

Ratings and reviews

3.4K reviews
Flavio Davide Borriello
September 8, 2026
The best idle game I played so far. It is a balanced optimisation game, fun and addicting and works perfectly also offline. Advertisements are there only to obtain some benefit. I don't give a full rating for the following points: - tricky to reorganise buildings when necessary. - Karen is quite slow to feed, animation should be quicker - the game becomes repetitive after a while, I personally stopped after level 24. Worth playing, I recommend it!
Did you find this helpful?
RSGapps - Idle Tycoon Games
October 21, 2026
Huge thanks for such a kind and detailed review! ❤️ In the latest version you can replace a building with another one without demolishing it first. We've noted your points about Karen and the later game 😊⚡
Nufail Hazeem
August 8, 2026
I like it, it has some good amount of ads. A good amount of timer. would love if it weren't that long just for a couple of days playing. But atleast it keeps me hook( atleast for now ) .. Keep giving more events for discount time.
Did you find this helpful?
frkn (stardustbin)
August 5, 2026
its a fantastic game but turns into a micromanaging hell in no time. you really need to love micromanaging and endless adjusting to enjoy this game. Im on island 2 and Im already overwhelmed. but if you love micromanaging this is the game for you.
Did you find this helpful?

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.