+$72/min
Stable Uranium output is double the common +$36/min economy baseline.
EconomyTier S
Mini War Nuclear Reactor Guide
Nuclear Reactor Guide
Nuclear Reactor is the anchor of Mini War's late-game economy. It appears in 3 local build-order slots, breaks the old +$36/min baseline with +$72/min Stable Uranium, and the second Reactor is explicitly called the economy skeleton.
Econ skeleton
The local Late Game Transition route says it directly: 'Second Reactor - the econ skeleton.'
3-Second Decision
Buy or Skip?
Nuclear Reactor is not just another expensive output building. It is the late-game anchor: one Reactor starts the phase, Data Center smooths it, and the second Reactor completes the skeleton.
Build timingReal value Build-order weightNeed two Do not doTier read
$30M package
Plan the first Reactor with Uranium Cave: $10M feedstock plus $20M conversion engine.
3 slots
Nuclear Reactor appears once as an Economy Opening endpoint and twice in Late Game Transition.
Second = skeleton
The second Reactor is not luxury. Local route copy names it the econ skeleton.
No Uranium Cave
Reactor is a conversion engine. It needs Uranium Cave as the raw supply side.
S late-game core
It is central to Economy First and Late Game Scaling because it defines the transition structure.
Building Stats
- Cost
- 20,000,000 💰
- Tier
- Tier S
- Category
- Economy
- Civilians
- N/A
- Income
- +72/min
- Upkeep
- 0/min
- ROI Score
- 0
- Payback
- 277,777.8 min
Payback Calculator
$
Used only to estimate your post-build income curve. Payback is calculated from building cost and income gain.
- Payback
- 277777 min 47s
- Minute 10 delta
- $-19,999,280
- After build
- $572/min
ROI Logic
3 Build Order Appearances — What Each One Means
Local route data gives Nuclear Reactor three separate slots. Each one has a different job: endpoint, late-game entry, and skeleton completion.
Economy endpoint
Opening final step
In local Economy Opening data, Nuclear Reactor is the final Step 11 at 12:00 with the tip 'This is what you've been building toward.'
Late entryTransition Step 1
Late Game Transition starts with Nuclear Reactor at 10:00 as a Critical mid-late economy milestone.
SkeletonTransition Step 3
The second Reactor appears at 14:00 with the note 'Second Reactor - the econ skeleton.'
Data Center role
Step 2 support
Data Center sits between Reactor #1 and Reactor #2 because it pairs with Reactor to smooth income.
Military followsSteps 4-5
After the economic skeleton, the same route immediately adds Air Base x2 and Missile Launcher x2.
Endgame trophyBlackhole
Blackhole Generator is Step 6: 'Endgame trophy. If you finish this, you've won.'
Nuclear Reactor's 3 Local Build-Order Slots
The page uses local route data, where Economy Opening's Reactor is the final Step 11.
| Metric | Route | Timing | Priority | Local note | Strategic meaning |
|---|---|---|---|---|---|
| Slot 1 | Economy Opening final Step 11 | 12:00 | High | Late-mid economy milestone | Economy route endpoint |
| Slot 2 | Late Game Transition Step 1 | 10:00 | Critical | Mid-late economy milestone | Late-game first move |
| Slot 3 | Late Game Transition Step 3 | 14:00 | High | Second Reactor - the econ skeleton | Skeleton completion |
One Reactor is a milestone. Two Reactors, with Data Center between them, are the local late-game economy skeleton.
Why Data Center Does Not Replace Reactor
Data Center has higher output, but the route places it after Reactor because it is a complement.
| Metric | Nuclear Reactor | Data Center |
|---|---|---|
| Route position | Step 1 and Step 3 | Step 2 |
| Build-order note | Milestone / econ skeleton | Pairs with Reactor to smooth income |
| Cost | $20M each, plus uranium supply | $50M |
| Output | +$72/min Stable Uranium | +$96/min Data Cubes |
| Decision | Anchor first | Smooth after Reactor #1 |
Build Reactor first, then Data Center, then Reactor #2. Data Center smooths the platform; it does not define it.
Production Ladder
Nuclear Reactor is the first finished-output building that clearly breaks the old +$36/min economy baseline.
| Metric | Cost | Income/min | Relative to +$36/min |
|---|---|---|---|
| Wheat Farm | $150 | +$36/min | 1x |
| Diamond Cave | $7.5M | +$36/min | 1x premium resource |
| Uranium Cave | $10M | +$90/min raw ore | 2.5x feedstock |
| Nuclear Reactor | $20M | +$72/min | 2x finished output |
| Data Center | $50M | +$96/min | 2.67x |
| Blackhole Generator | $1B | +$288/min | 8x |
Reactor is the first finished-output step that changes the production tier, which is why the routes orbit around it.
Two-Reactor Math
The Math: Why Two Reactors Are Better Than One
The second Reactor matters because it doubles the stable uranium platform before the route turns military.
| Metric | Reactor #1 package | Two Reactor packages | Full $110M skeleton |
|---|---|---|---|
| Total cost | $30M | $60M | $110M |
| Composition | Uranium + Reactor | 2x Uranium + 2x Reactor | 2x Reactor packages + Data Center |
| Output/min | +$72/min | +$144/min | +$240/min |
| 40% market model | +$100.8/min | +$201.6/min | +$336/min |
| Strategic read | Entry | Skeleton base | Economic platform before military |
Nuclear Reactor's job is structural. One starts the late-game; two, with Data Center, create the platform that funds military depth.
Reactor #1Reactor #2 Full skeleton
$30M entry
The first package marks entry into late-game, but the local route does not stop there.
$60M base
Two packages create +$144/min before market effects and match the build-order skeleton note.
$110M
Add Data Center between the two packages for the complete +$240/min late-game economy platform.
Player Pattern
What the Local Routes Say About Nuclear Reactor
The clearest source is not a generic tier list. It is the route language in the local build-order data.
Economy Opening
Built toward it
The local Economy Opening endpoint says Nuclear Reactor is what the whole route has been building toward.
Late transitionCritical first step
Late Game Transition starts with Reactor #1 at Critical priority, then Data Center, then Reactor #2.
Skeleton noteSecond Reactor
The phrase 'Second Reactor - the econ skeleton' is the strongest clue: two Reactors are the intended structure.
3 Mistakes Players Make With Nuclear Reactor
Stopping at one
The first Reactor is a milestone. The second Reactor is the economy skeleton in local route language.
Data Center first
Data Center has higher output, but it pairs with Reactor. The route order is Reactor, Data Center, Reactor #2.
Mistake 3Skipping military
After Reactor #2, Late Game Transition immediately adds Air Base x2 and Missile Launcher x2.
Slot Decision
Nuclear Reactor vs Data Center — Which Comes First?
Data Center produces more per minute, but it is positioned as a smoothing partner. Nuclear Reactor is the anchor and appears before it.
| Decision Point | Nuclear Reactor | Data Center |
|---|---|---|
| Cost | $20,000,000 | $50,000,000 |
| Income/min | +$72/min | +$96/min |
| ROI Score | 0 | 0 |
| Route position | Step 1 and Step 3 | Step 2 |
| Route note | Milestone / econ skeleton | Pairs with Reactor to smooth income |
| Dependency | Uranium Cave feedstock | Best after Reactor #1 |
| Decision | Build first | Build second |
Build Nuclear Reactor first, then Data Center, then the second Reactor. Data Center is the stabilizer, not the replacement.
Late-Game Blueprint
The Full Late Game Transition Blueprint
Late Game Transition is not pure economy forever. It builds the economy skeleton first, then immediately turns that surplus into military depth.
- 01Step 1
Reactor #1
10:00 Critical. Mid-late economy milestone.
- 02Step 2
Data Center
12:00 Critical. Pairs with Reactor to smooth income.
- 03Step 3
Reactor #2
14:00 High. Second Reactor - the econ skeleton.
- 04Step 4
Air Base x2
16:00 High. Military depth from income surplus.
- 05Step 5
Missile Launcher x2
18:00 High. Conquest composition.
- 06Step 6
Blackhole
20:00 Medium. Endgame trophy; most lobbies end before this.
The route says the late-game rhythm clearly: Reactor, Data Center, Reactor #2, then immediate military depth.
Production Chain
Reactor Economy Platform
Nuclear Reactor belongs to a platform, not a single-building decision.
$30M
Uranium Cave plus Reactor #1.
$60M
Two feedstock + conversion pairs.
$110M
Two Reactor packages plus Data Center.
Nuclear Reactor is the anchor because the entire platform is organized around it.
Build Timing
When Exactly Should You Build Nuclear Reactor?
The practical trigger is a $30M first package, then a $110M platform plan. Reactor is the late-game destination for economy routes.
First package
$30M
$10M Uranium Cave plus $20M Nuclear Reactor. At $10,000/min, saving this takes about 3,000 minutes.
Full skeleton$110M
Two Reactor packages plus Data Center. At $20,000/min, the full platform takes about 5,500 minutes.
Route signalFinal opening goal
Economy Opening's local final Reactor step says this is what you have been building toward.
After skeletonMilitary depth
Once Reactor #2 is done, follow the route into Air Base x2 and Missile Launcher x2.
Build Nuclear Reactor after Diamond Cave and Uranium Cave when you can fund the first $30M package. Then follow Reactor -> Data Center -> Reactor #2 before shifting into military depth.
Unlock Chain
✅ No prerequisites. Available from the start.
Build Strategy
Build Reactor #1 With Uranium
The useful entry package is Uranium Cave plus Nuclear Reactor. Do not treat Reactor as independent of its feedstock.
Package -> $30M
Add Data Center Next
Data Center sits between the two Reactor packages in Late Game Transition because it smooths income.
Step 2 -> Data Center
Finish Reactor #2
The second Reactor completes the economy skeleton. After that, the route shifts immediately into Air Base and Missile Launcher.
Step 3 -> Skeleton
Appears In
Economy Opening
Macro-first. Maximum income before any military commitment.
Step 11 · 12:00High 🟠
Note: Late-mid economy milestone.
Late Game Transition
Convert your lead into Nuclear Reactors and Data Centers.
Step 1 · 10:00Critical 🔴
Note: Mid-late economy milestone.
Late Game Transition
Convert your lead into Nuclear Reactors and Data Centers.
Step 3 · 14:00High 🟠
Note: Second Reactor - the econ skeleton.
Current Meta Usage
Best Used With
Other Economy Buildings
Patch History
No confirmed patch changes are recorded for Nuclear Reactor yet. This section will update when verified balance changes are added to the building data.
Frequently Asked Questions
Is Nuclear Reactor worth building in Mini War?
Yes. Nuclear Reactor is the most important late-game economy anchor. It appears in 3 local build-order slots and produces +$72/min, the first finished-output jump above the common +$36/min baseline.
How many Nuclear Reactors do I need?
Two. The local Late Game Transition route places Reactor at Step 1 and again at Step 3, where the note says 'Second Reactor - the econ skeleton.' One Reactor is entry; two complete the skeleton.
Nuclear Reactor vs Data Center — which should I build first?
Build Nuclear Reactor first. Data Center's local build-order note says it pairs with Reactor to smooth income, so the correct order is Reactor #1, Data Center, then Reactor #2.
Does Nuclear Reactor need Uranium Cave to work?
Yes. Nuclear Reactor converts uranium ore from Uranium Cave into Stable Uranium. Plan each Reactor as part of a $30M package: $10M Uranium Cave plus $20M Nuclear Reactor.
When should I build Nuclear Reactor in Mini War?
Build it after Diamond Cave and Uranium Cave when you can fund the first $30M package. In local Economy Opening data, Reactor is the final route endpoint; in Late Game Transition, it is Step 1.
What should I build after Nuclear Reactor in Mini War?
Build Data Center next, then build a second Uranium Cave plus Nuclear Reactor package. After the $110M skeleton is complete, follow Late Game Transition into Air Base x2, Missile Launcher x2, then Blackhole Generator.