RoWorld Nukes, SAMs and Fallout

Nuclear weapons turn a RoWorld stalemate into a cratered race for 80% World Control — or into a mathematically stuck map. This guide covers Missile Silos (~1,000,000 gold), Atom / Hydrogen / MIRV munitions, SAM interception, the Stars Arsenal (Mega Nuke and friends), fallout’s effect on the win bar, troop decontamination, and X to cancel targeting. Use it with the late-game plan in How to Win and structure rankings on the Tier List.

RoWorld (formerly RoFront) is free Roblox online multiplayer. Nukes are a late tool, not an opening build.

Missile Silo — the launch pad, not the bomb

A Missile Silo costs on the order of 1,000,000 gold. Building it unlocks nuclear launch access. It does not automatically give you free warheads — Atom, Hydrogen, and MIRV options are separate purchases or selections once the Silo exists. If your gold rate cannot replace a million-gold hole, you are not ready. Stabilise Cities, Factories, and a Defense Post line first.

Sane sequence before you click Silo:

1. Stable gold rate and multiple Cities.
2. Hold the important border with troops and a Defense Post.
3. Confirm 1M gold will not empty the plan for the next City or SAM.
4. Place the Silo in defended interior land, not on a tip a Boat can steal.

RoWorld nukes and fallout

Atom, Hydrogen, and MIRV

Once the Silo is up, the documented weapon family includes:

• Atomic Bomb — tactical / smaller strategic strike for hubs and soft lines.
• Hydrogen Bomb — heavier damage to population, infrastructure, and land.
• MIRV — multi-warhead pressure against dug-in defensive belts and troop concentrations.

Exact gold prices for each munition vary by build and are printed in-menu — always read the button. Purpose beats payload size:

• Delete or soften an enemy Silo before they glass you.
• Crack a Defense Post wall ahead of a ground wave.
• Punish a capital cluster that is feeding their rate.

Do not nuke “because you can.” Every crater risks fallout on land you still need for percentage.

Targeting and X cancel

Enter nuke targeting from the Silo / Nuke radial flow, choose the impact, then confirm. X cancels a pending nuclear target on desktop — use it the instant the crosshair sits on your own core, an ally you still need, or the last land bridge into 80%. Touch devices usually expose an on-screen Cancel. Misclick discipline matters more than aim flair. Full input list: Controls.

After a strike lands, keep reading the Attacks panel. Nukes change territory; they do not auto-win the ground war. Send follow-up attacks at a deliberate ratio and re-plant Defense Posts on the new line.

SAM Launchers — your anti-nuke roof

SAM Launchers are reported around 1,500,000 gold for the first, with the next often jumping higher (about 3,000,000 in some observations). They automatically track and shoot down incoming ballistic and nuclear warheads whose impact falls inside their dome (commonly described on the order of ~70 tiles for coverage planning).

SAMs protect your core, not the whole continent. Place them over Cities, Silos, and dense Factory clusters. Tip videos (including Radex Tips’ October 2026 strategy guide) stress parking SAMs extremely close to your nuclear sites — too much gap and a warhead can still delete a Silo outside the effective dome. Buying a Silo without SAM coverage invites a mirror strike that deletes your investment. In a nuke-heavy lobby, SAM before vanity Arsenal flex. More border-holding context: Defense Strategy.

Multiple Silos beat one glass cannon

Public coaching also recommends several Missile Silos in different defended locations instead of one exposed pad. Spread launchers so a single Hydrogen or Arsenal strike cannot erase your entire nuclear plan. Watch enemy Silo cooldowns before you commit a salvo, and against rivals with stacked SAMs prefer several smaller nukes or a ground open rather than one telegraphed heavy warhead into a brick wall.

Stars Arsenal — not gold, not always Silo-gated

Separate from Silo ammo, the Arsenal / Stars menu spends Stars on one-off strikes and support. Observed menu items include:

Arsenal item	Stars (observed)
Mega Nuke	20,000
Scattershot	30,000
Reinforcements	40,000
Artillery	50,000
Air Strike	60,000
Railgun	75,000

Do not pay Star prices with gold. Do not assume every Arsenal strike requires a Silo — the menu is listed apart from Silo munitions. Blast radii are not fully published; treat Mega Nuke as a scarce closer, not a substitute for Cities. Check the Tier List when deciding whether Stars are better spent on Mega Nuke versus support options in the current meta.

Fallout vs the 80% win

Fallout / irradiated land does not count toward World Control. You can paint the map in your colour, glass the last rival, and still sit under 80% because countable tiles were removed from the denominator/numerator logic the HUD uses. A badly nuked endgame can become mathematically awkward even while flags remain everywhere.

Implications:

• Prefer nuking enemy production and Silo grids you do not need to own immediately.
• Avoid reciprocal glassing of the final contested belt.
• After you take irradiated ground, decontaminate before you expect the GOAL bar to move.

Decontaminate with troops

Irradiated tiles can be reclaimed: click the fallout / reclaim tile and spend troops (attack ratio applies, same pool as expands and attacks). Clear fallout on land that sits between you and 80%, and on income tiles you intend to Factory again. Leaving green death zones in your core is how “winning” armies stall at 76–79%.

Decontamination is not free — a high ratio while clearing can strip the border that is still under conventional attack. Drop to 10–25% if you are cleaning while defending.

Nuclear doctrine cheat sheet

Goal	Tool	Watch-out
Unlock launches	Silo ~1M gold	Income must recover
Tactical / strategic hits	Atom / Hydrogen / MIRV	Fallout on needed land
Survive the exchange	SAM ~1.5M+	Covers dome, not whole map
Star flex / closers	Mega Nuke & Arsenal	Stars ≠ gold; scarce
Fix the win bar	Troop decontaminate	Ratio still drains army
Stop a misclick	X cancel	Muscle memory before launch

When not to go nuclear

• You are still in the early City / Factory curve.
• You have no SAM and the lobby already has Silos.
• The only path to 80% is the land you are about to irradiate.
• You are already Traitor-marked and surrounded — a nuke will not fix five discount borders.

Play nukes as a scalpel inside the How to Win late phase. Economy builds the Silo; SAMs keep it; ground troops and decontamination cash the 80%.