Hydrogen Bomb Guide for OpenFront.io

Main Takeaway: The Hydrogen Bomb is the most powerful strategic weapon in OpenFront.io, capable of devastating large swaths of territory and manpower. Deploy it via a Missile Silo only in late–game scenarios when you have amassed at least 5 000 000 gold and sufficient defenses against enemy SAMs.

1. Overview

The Hydrogen Bomb is a late–game missile that delivers unparalleled destructive power to a target region. When launched from a Missile Silo, it:

2. Requirements & Deployment

RequirementDescription
Building prerequisiteMissile Silo (must be constructed and cooled down)
Gold cost5 000 000 gold
Silo cooldown75 ticks (7.5 seconds)
Tech prerequisitesNone beyond silo access

To use:

  1. Build or upgrade a Missile Silo.
  2. Accumulate ≥ 5 000 000 gold.
  3. Select your target tile within range.
  4. Launch the Hydrogen Bomb.

3. Flight & Interception

AttributeValue
Maximum range120 tiles
Flight speed6 tiles/tick
SAM interception range80 tiles
SAM hit chance50% against warheads

Enemy SAM Missiles and SAM Launchers can intercept your Hydrogen Bomb if positioned within 80 tiles of its path; they have a 50% chance to shoot down the warhead.

4. Blast Characteristics

The explosion comprises two concentric zones:

ZoneRadius (tiles)Effect
Inner80Maximum destruction of units and buildings in zone.
Outer100Partial destruction and heavy troop casualties beyond inner radius.

Casualty calculation for humans in affected tiles uses:
$$ \text{troopLossFactor} = \frac{5 \times \text{humans}}{\max(1, \text{tilesOwned})} $$
This yields severe manpower loss proportional to population density.

5. Fallout Effects

After detonation, all tiles within the outer radius become radioactive:

6. Strategic Usage

7. Comparative Summary

WeaponCost (gold)Inner/Outer RadiusRangeCooldown (s)
Atom Bomb750 00012 / 301207.5
Hydrogen Bomb5 000 00080 / 1001207.5
MIRV25 000 00025 / 301207.5