
Nuclear Reactor Simulator: Take Control. Prevent Disaster. Power the World.
Modeled estimate, not a reported figure. How we estimate →
Discounts
Every price cut of more than 20% we have observed, in each market that quoted one, with this game's chart position on either side of it. These are episodes, not a model: a sale is one event, and one event cannot tell you what the next one will do.
Reviews, worldwide (the counter carries no country): 0.29/day in the week to Aug 24 → 0.29/day in the week after.
Reviews, worldwide (the counter carries no country): 0.57/day in the week to Jul 20 → 0.5/day in the week after.
For scale, across Steam · Top Sellers · Brazil over the last 30 days: the 25 chart moves that followed a price cut of more than 20% went a median of 10 places towards #1, and the 2,413 moves with no price cut behind them went 2 away. One store, one chart, one country — it is the only place we have enough observations to say even that.
Prices outside the United States have been collected since 6 August 2026 and chart positions since 19 July 2026, so a cut older than that has no market to compare and a market that joined later has no history yet. Nothing here is converted between currencies.
About
Welcome to Nuclear Reactor Simulator, where you step into the shoes of a nuclear power plant operator tasked with managing one of the most complex and dangerous systems on Earth. With the help of your AI-powered Operational Assistant (AO), you’ll navigate the intricacies of reactor mechanics, balance energy production, and prevent catastrophic failures.

This isn’t just a game—it’s a deep, immersive simulation that challenges your strategic thinking, problem-solving skills, and ability to stay calm under pressure. Whether you’re a seasoned simulation enthusiast or a curious newcomer, Nuclear Reactor Simulator offers a thrilling and educational experience like no other.
Control Every Aspect: Manage over 200 parameters and 150 switches across multiple reactor modules, including the Control Room, Containment Building, Turbine Building, and Cooling Towers.
Dynamic Systems: Monitor and adjust reactor power, coolant flow, steam generation, and more to maintain optimal performance.
Emergency Scenarios: Respond to unexpected events like equipment failures, floods, and fires with quick decision-making and precise actions.

Operational Assistant (AO): Your AI companion helps with ignition protocols, alarm systems, and crisis management. Upgrade its skills to unlock advanced functionalities.
Remote Control: Use your tablet to manage reactor tasks, control AO, and oversee operations from anywhere in the plant.
Daily Objectives: Meet energy production goals to earn Prestige and Experience Points. Level up to unlock more challenging scenarios.
Resource Management: Balance fuel consumption, maintenance costs, and community demands to keep your plant running efficiently.
Prestige System: Spend Prestige Points on upgrades, fuel blocks, protective gear, and even radioactive waste cleanup.

Enhanced Core Design: Operate a state-of-the-art reactor with nine fuel blocks, 72 control rods, and advanced safety systems.
Chemical Module: Dive into the chemistry of reactor operation with boric acid dosing, ion exchange filtration, and pH management.
Thermal and Steam Balance: Master the delicate equilibrium between steam generation, coolant flow, and energy output to avoid system failures.
Realistic Soundtrack: Feel the tension and excitement of managing a nuclear power plant with an atmospheric soundtrack.
Detailed Environments: Explore every corner of your plant, from the Control Room to the underground maintenance tunnels.

Nuclear Reactor Simulator stands out with its unparalleled depth and realism. Unlike other simulation games, it doesn’t hold your hand with step-by-step tutorials. Instead, it empowers you to learn through experimentation, research, and community collaboration.
No Hand-Holding: Consult the in-game manual, research real-world reactor operations, or join the community to master the game’s mechanics.
Constantly Evolving: Regular updates introduce new features, improve realism, and refine gameplay based on player feedback.
Educational Value: Learn the science behind nuclear energy while having fun.
Thrilling Challenges: Every decision matters. Will you prioritize power output or safety? Can you handle the pressure of an emergency?
Endless Replayability: With dynamic systems, evolving challenges, and a community-driven learning curve, no two playthroughs are the same.
A True Simulator: This isn’t just a game—it’s a realistic, hands-on experience that will test your skills and keep you coming back for more.

Become part of a growing community of players who share tips, strategies, and stories of their reactor operations. Whether you’re looking for advice or want to show off your achievements, there’s a place for you in the Nuclear Reactor Simulator community.
Step into the Control Room, fire up the reactor, and see if you have what it takes to power the world—or risk a meltdown. Nuclear Reactor Simulator is waiting for you.

Engagement
Reviews
Themes across 89 recent reviews and how positive each mention is. A keyword signal, not full sentiment analysis.
Reviews
The sim is unfortunately extremely poor. It genuinely seems as if the dev is just reading Wikipedia articles and trying to base the reactor physics on that. Other features in the game are half baked at best. If you need to do maintenance, you have to use AO. AO's pathing is some of the worst I've seen bin any commercial release over the last decade. End result being that you will have parts that you call for maint on and it just won't happen. It doesn't help that the plant design is maddeningly unrealistic and doesn't lend itself to any degree of a workable simulator. (Also, don't go to the exterior freight pumps, that section of the map will drop your framereate by 30 for no good reason.) I hate that I have unironically seen better nuclear reactor simulations on roblox then this game appears capable of doing.
Not sure when this happened, but the dev sold out to garbage publisher Microprose. Very upsetting. Consider any future development or improvements to be dead. The game isn't even great, the game is missing a ton of mechanics that could bring a balanced experience and make the game have more variety. But now that the Dev sold out, its done for. Been around these types of situations many times in the past to know what happens when a small dev sells out.
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Genres
Stats
All-time low is the lowest price we've recorded for this game since we started tracking it.
Languages: English*, Spanish - Latin America, German, Russian, Ukrainian*languages with full audio support
Hours played at review time, across 89 reviews with recorded playtime.
positive critical· bar length = how often the theme comes up
I want to love this game, i really do. but also i want to be able to save the game and go to sleep and not have to start from scratch the next day. would also love the start up guide to actually update when i am not looking at it. or for me to be able to check off things manually when i have done them if the game doesn't automatically update the check list. maybe actually have some guides on chem management, not just the how to turn the reactor on. though ultimatly, fix it so that i can actually save the game, and this will be a positive review. everything else is minor QOL improvments, but not being able to save the game and re-loade it without the game going "oh we have nothing here" while also telling me that everything is there.... kinda a deal breaker
It looks very promising at first, but unfortunately the closer I look the clearer it becomes that there's no physically correct simulation, only a bunch of ad-hoc approximations that look kind of right in simple situations but are rather meaningless. This is a game so I don't expect precision but even most basic rules are completely disregarded, massive amounts of energy, heat and steam/water appear and disappear in the system with no explanation. For example: * heat generation in the core and heat removal through the coolant loop can be wildly mismatched with no apparent effects, with huge amounts of heat seemingly disappearing to nowhere * increasing primary flow reduces steam generator outlet temperature relative to inlet and also reduces steam generation (both backwards from reality, and also physically self-contradictory) * if the condenser overheats and stops condensing, the excess steam just disappears (while pressure remains at near-vacuum) and everything keeps running as normal except you lose some water from the secondary loop. These are some of the most important elements of the most central simulation and they just don't work at all! It's scary to think what the less obvious systems are doing in the background. So it's not worth getting into the game. It's possible to learn to operate the plant and meet objectives but you won't be learning to operate a nuclear plant (even a very simplified one) but some made up nonsense and it's not even fun because nothing reacts like you might expect. The developer is saying they're working on a new simulation engine and I'll revisit the game when that releases but it's unclear how much of it is real because most communication from them (including responses to reviews here) is clearly AI-generated. I hope they understand and care about what they're doing and this is just their way of dealing with a language barrier.
Not good. Deliberately as awkward as possible. Bad translations from what I assume is French, inconsistent naming of extremely important items, horrible bugs, awful UI, no signs of improving any of these.
Warning 4 of achievements are unobtainable as the scenario for those achievement have been removed from the game.
TL;DR: Recommend, BUT, really should come with an early access flag. Still buggy, but the developer is still very much actively working on it. Absolutely addicted. Really enjoyable once you begin to understand how everything works, is linked, and reacts to other systems. Lots of tutorials out there that do a great job of explaining the concepts. You WILL have to invest a large amount of time to learn (probably 12 hours minimum in YouTube tutorial videos; If you are looking for a good concepts/tutorials videos check out Leonidas Ares), but it's worth it. With my PC I'm running very high settings and have no problems with stability. I have had more than a few game breaking bugs, mostly around reactor fuel replacement and control rod replacement. Some people have issues with outside of the plant, some people have trouble saving and/or loading saves. A few very lucky people seem to have no problems whatsoever. That being said, the developer is super active and updates are coming out all the time. Honestly I like this dev enough that I bought the generator set DLC just to throw a few extra bucks their way. I'll never use it, but if it helps them develop, I'm in. They seem to be very active in the community and, as previously mentioned, are always putting out new patches.
If the manual was useful this could be a lot of fun. Instead you just follow the tutorial to get the thing up and running and then react to warning lights as they go off, googling the symptoms and hoping you can get a solution.
10/10! 1: Enter the game 2: Do tutorial 3: Exit and make new game 4: Meltdown disaster 5: Restart and fool around 6: Remote control AO and electrocute myself 7: die but remain as the AO 8: Game pauses and im forced to quit/restart 9: Game breaks and cant play 10: Write review 11: reinstall the game
Без должного образования не то что реактор запустить сложно, его даже [b]взорвать сложно[/b]! В этой игре буквально нужно делать всё по гайдам или прочитать инструкцию на 150 страниц! [spoiler]Всем советую, игра крутая![/spoiler]
Players by region
Where this game's players are, estimated from review languages.
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