
Steam app 4190240
Nuclear Design Bureau
Data source: Steam Web APILast updated: How we collect this data
Nuclear Design Bureau player count chart
Nuclear Design Bureau has a small but active player base. 85 people are playing it on Steam right now. Over the last 30 days its player count has been declining (down 53% on the month before).
History from Sep 16, 2026
Nuclear Design Bureau monthly player count
| Month | Avg. players | % Gain | Peak players |
|---|---|---|---|
| November 2026 | not enough data | -62% | 95 |
| October 2026 | 111 | -55.78% | 250 |
| September 2026 | 251 | n/a | 565 |
How many people play Nuclear Design Bureau right now?
Right now, 85 players are in Nuclear Design Bureau on Steam. That makes it the #3,141 most played game on Steam at the moment. In the last 24 hours it peaked at 85 players. Today's peak is 35% below its 30-day average daily peak of 131.
Nuclear Design Bureau player count history
Over the last 30 days Nuclear Design Bureau averaged a daily peak of 131 players, down 53% compared with the 30 days before (280). In its first month after release (Sep 14, 2026) it peaked at 565 players. Today's player count is 15% of its all-time peak of 565, set on Sep 19, 2026.
Best time to play Nuclear Design Bureau
Based on the last 14 days, Nuclear Design Bureau is busiest around 20:00 UTC (3 PM in New York) and quietest around 09:00 UTC (4 AM in New York), when about 53% fewer people are online. For the fastest matchmaking, play close to the peak hour.
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Hardspace: Shipbreaker239 playing nowNuclear Design Bureau players by hour and weekday
When Nuclear Design Bureau has the most players online, by weekday and hour, shown in your time zone. Busy hours mean faster matchmaking and fuller servers; quiet hours are best for solo play.
Average players for each hour of the week over the last 28 days, from our Steam player counts.
Compare Nuclear Design Bureau with similar games
- Nuclear Design Bureau vs Kerbal Space Program
- Nuclear Design Bureau vs Totally Accurate Battle Simulator
- Nuclear Design Bureau vs Bridge Constructor Portal
Player counts, peaks, reviews and prices side by side. Compare any Steam games
About Nuclear Design Bureau
Design. Simulate. Detonate. As a junior engineer at the Kurchatov Institute, you design atomic devices to satisfy the demands of the State. A hardcore physics game simulating hydrodynamics, neutron transport, and thermonuclear fusion.
- Developer
- Design Bureau KB-11
- Released
- Sep 14, 2026
- Genre
- Indie, Simulation, Strategy, Early Access
- Steam Deck
- Unsupported
- Languages
- 1 language
Screenshots
Nuclear Design Bureau price history
Good time to buy? No sale seen yet. Nuclear Design Bureau costs $9.99 and we have not recorded a discount for it so far.Next Steam sale: Steam Winter Sale, Dec 17 to Jan 4. See the countdown
US price on Steam. Checked daily.
Get Nuclear Design Bureau alerts by email
Nuclear Design Bureau reviews over time
Positive and negative Steam user reviews per week, from Steam's review history.
Nuclear Design Bureau achievements
Nuclear Design Bureau has 37 Steam achievements. On average a player has unlocked 20.7% of them; the rarest, APFSDS, is held by 0.9% of players.
State ServantComplete your first directive.92.6%
Critical MassReach a confirmed k-effective of at least 1.0.89.3%
Unstoppable ChainReach a confirmed k-effective of at least 1.2.88.9%
First LightInitiate your first nuclear chain reaction.88.7%
Hero of LaborConsume at least 20% of the initial fissile inventory in one run.56.6%
Hydrogen AgeProduce at least 0.10 kilotons of fusion yield in one run.53.3%
Precision EngineerComplete Compression Qualification.53.0%
The FizzleStart a supercritical chain reaction that ends below 0.05 kilotons.50.2%
Megaton ClubReach 1 Megaton total yield.49.9%
Cold WarriorComplete 10 Directives.40.1%
King of BombsComplete the final Tsar Bomba directive.28.8%
No PlutoniumMore than 10 kt from a uranium implosion with no plutonium.5.7%
One ChannelMore than 10 kt from one detonator.4.8%
Il-28 PayloadMore than 5 kt from a device under 75 kg.4.6%
Composite CoreMore than 20 kt from a plutonium and U-235 core.4.5%
Demolition ChargeBetween 10 and 100 tons from a device under 50 kg.4.1%
406 mmMore than 5 kt from inside a 406 mm shell.4.1%
Salvaged CastingMore than 20 kt from the reject casting as delivered.3.4%
InterceptorBetween 30 and 60 kt from a device under 250 kg.3.2%
Provincial PlantMore than 10 kt with PBX only and no generator.3.2%
Prompt CriticalPeak k above 1.5 from at most 6 kg of fissile metal.3.0%
T-5 TorpedoMore than 3.5 kt from inside a 533 mm torpedo.3.0%
R-5M Nose ConeMore than 10 kt from inside a missile nose cone.2.9%
Compression RecordBulk Fissile Density above 1.8 with more than 8 kg of plutonium.2.8%
Prompt Critical IIPeak k above 1.7 from at most 9 kg of fissile metal.2.7%
Light ChargeMore than 5 kt from a device under 50 kg.2.6%
Parachute ContainerMore than 10 kt from inside a 700 mm container.2.6%
Lightest KilotonMore than 1 kt from a device under 25 kg.2.5%
Clean ChargeMore than 400 kt, under a quarter of it from fission.2.5%
Plutonium Economy IIMore than 7 kt from each kilogram of fissile metal.2.4%
Plutonium EconomyMore than 4 kt from each kilogram of fissile metal.2.3%
One-Point SafeFull yield as built, under 1 ton from one detonator.1.6%
Selectable YieldThree yields from one device, changing only the generator time.1.5%
HEAT-FSHidden achievement1.3%
APHEHidden achievement1.2%
Special Orders ClosedComplete every Special Order in the register.1.2%
APFSDSHidden achievement0.9%
Global unlock rates from Steam, most common first.
Latest Nuclear Design Bureau news and patch notes
- Nov 5, 2026 Hotfix 11/5/26 b Patch notes
- Nov 5, 2026 Hotfix 11/5/26 Patch notes
- Oct 30, 2026 Hotfix 10/30/26 Patch notes
- Oct 26, 2026 Hotfix 10/25/26 Patch notes
- Oct 24, 2026 Hotfix 10/23/26 Patch notes
- Oct 22, 2026 Hotfix 10/22/26 Patch notes
- Oct 21, 2026 Hotfix 10/21/26 Patch notes
- Oct 17, 2026 Hotfix 10/17/26 Patch notes
Official announcements from the developer on Steam.
Nuclear Design Bureau FAQ
Is Nuclear Design Bureau dead?
Nuclear Design Bureau has a small but active player base. 85 people are playing it on Steam right now. Over the last 30 days its player count has been declining (down 53% on the month before).
How many people play Nuclear Design Bureau?
85 people are playing Nuclear Design Bureau on Steam right now. In the last 24 hours it peaked at 85 concurrent players.
What is the all-time peak player count for Nuclear Design Bureau?
Nuclear Design Bureau reached its all-time Steam peak of 565 concurrent players on Sep 19, 2026.
Is Nuclear Design Bureau growing or declining?
Nuclear Design Bureau is declining. Its average daily peak over the last 30 days was 131, down 53% compared with the previous 30 days.
When is Nuclear Design Bureau most active?
Nuclear Design Bureau usually has the most players around 20:00 UTC (3 PM in New York) and the fewest around 09:00 UTC (4 AM in New York).
How much does Nuclear Design Bureau cost?
Nuclear Design Bureau costs $9.99 on Steam in the US. Prices are checked daily and can differ by region.
What is the lowest price Nuclear Design Bureau has been on Steam?
We have not seen Nuclear Design Bureau discounted on Steam since October 2026, so the lowest US price we have recorded is its regular $9.99.
Is Nuclear Design Bureau on sale right now?
No, Nuclear Design Bureau is at its full price of $9.99 on Steam right now.
Is Nuclear Design Bureau good?
Steam players rate Nuclear Design Bureau Mostly Positive: 78% of 441 reviews are positive.
When did Nuclear Design Bureau come out?
Nuclear Design Bureau was released on Steam on Sep 14, 2026.
Who made Nuclear Design Bureau?
Nuclear Design Bureau was developed by Design Bureau KB-11.
Is Nuclear Design Bureau still worth playing?
Nuclear Design Bureau has a smaller but active community on Steam today (85 playing right now), and players still rate it well (Mostly Positive).
RageQuit Charts is not affiliated with Valve Corporation. Steam and the Steam logo are trademarks of Valve Corporation. Player counts come from the official Steam Web API.





