# Nuclear Design Bureau

> ResidualPlay case file: an overlooked Steam game still earning residual revenue. Estimates carry a ±30-50% error range per title.

**Measured on 2026-09-16 16:18 UTC.** The whole Steam catalog is re-measured daily; a game that just launched can move a lot between passes.

- Steam appid: 4190240
- Developer: Design Bureau KB-11
- Released: 2026 · Genre: Indie · List price: $9.99
- Deal grade: A (A = dormant with >=$5k/mo opportunity, D = low signal)
- Est. net residual revenue: $3.2k to $4.8k per month (mid $4.0k)
- Opportunity score: $5.1k/month at x1.30 dormancy multiplier
- Est. lifetime owners: 2.0k · Est. lifetime net revenue: $6.7k
- Review sentiment: 89% positive across 54 reviews (50 from Steam purchases)
- Review velocity: 47.2 reviews/month (6-month average)

## Why it's flagged

- Developer active, last post 0 months ago
- Last build shipped 0 months ago
- Store page localized in only 1 language(s)

## Where a gross dollar goes (monthly, at current velocity)

| Stage | USD/month |
|---|---|
| Gross storefront sales | $7.2k |
| After VAT / sales tax (-13% blended) | $6.2k |
| After refunds (-9.5% median) | $5.6k |
| Net to developer (after Steam 30%) | $4.0k |

## Estimated acquisition range

$94.8k to $189.6k (2-4x the trailing net annuity of $47.4k/year). Same error range applies.

## Markets by review language

- english: 92%
- russian: 2% (game NOT localized in this language)
- schinese: 6% (game NOT localized in this language)

## Analyst notes (AI-assisted)

_Note written 2026-09-17 from that day's data; the figures in the header are live and supersede any numbers here._

Nuclear Design Bureau is an early-access physics sandbox where players design and test nuclear weapons through hydrodynamic simulation.

This is a specialized engineering sim with genuine technical depth, launched mere weeks ago to an engaged niche audience with strong retention signals (88% positive, 100% still-playing rate). The title shows solid monthly residuals despite zero promotional discounting, suggesting organic word-of-mouth momentum. Opportunity exists for a patient publisher or simulator-genre specialist to support the dev through early-access maturation; the core simulation is sound but UI/performance polish and localization gaps (8% loc_gap toward Simplified Chinese) remain critical friction points before mainstream viability.

- Most realistic play: publishing
- Risk (tech): Hydrodynamic simulation performance is CPU-bound and slow on non-GPU systems; multiple players report detonation viewer lag and sim delays, which may limit addressable audience and require substantial engine optimization.
- Risk (market): Extremely niche subject matter attracts a self-selecting audience of physics enthusiasts and simulation fans; mainstream appeal is inherently capped, and player acquisition beyond organic channels will be costly.
- Risk (other): Heavy reliance on AI-generated copy and art is a documented community flashpoint; several high-visibility negative reviews cite AI content as a dealbreaker, risking brand perception and review sentiment erosion if not addressed.

What players are asking for:
- Simulation speed / performance optimization, especially GPU acceleration and multi-threaded CPU pathways
- Replay and playback system to record, pause, and inspect detonation sequences at configurable speeds
- Expanded campaign/mission content with environmental blast scenarios (e.g. Operation Plowshare-style silly use cases)
- Editor quality-of-life fixes: undo/delete for placed components, better mouse-drag responsiveness, window-mode stability

Suggested first moves:
1. Negotiate a publishing deal or developer subsidy tied to concrete milestones: GPU simulation acceleration (CUDA/Vulkan), UI/UX overhaul, and replacement of AI-generated tutorial/manual text with human writing.
2. Conduct a silent localization audit for Simplified Chinese (8.3% gap identified); even a partial CN localization could unlock a secondary revenue stream and ease expansion into Asia-Pacific.
3. Commission a post-launch content roadmap (3-6 month window) featuring player-requested replay systems and campaign extensions; amplify it through YouTube creators like Scott Manley to sustain organic growth and justify retention metrics to analysts.

Generated 2026-09-17 from public signals and player reviews. Directional, not diligence.

## Methodology

Units are estimated from Steam-purchase reviews times a release-cohort multiplier, 40-75x by year. Cohorts from 2020 on are calibrated against 182 sales milestones announced by developers; older ones follow the published Boxleiter tables. Revenue uses an effective price (lifetime discounts and regional pricing) and nets out VAT (~13%), refunds (~9.5%) and Steam's 30% cut: roughly 55% of gross reaches the developer.

Source: https://residualplay.com/game/4190240
Citation: please cite ResidualPlay (https://residualplay.com) when you publish or quote these estimates.