Nuclear Warheads

Nuclear weapons are the most terrifyingly destructive instruments of death ever created. If they are included in your campaign, they are devastating enough to have slightly more complicated effects than regular weapons. Nuclear weapons, unlike conventional explosives, have four distinct threats:

1.   The explosive fireball: the area affected is 3 scales higher than a conventional explosive of the same mass, and deals +20 damage. All damage is heat.
2.   The shockwave: the area affected is 4 scales higher than the fireball, and deals as much damage as a conventional explosive, but the damage is Bludgeoning. There is no nuclear shockwave in space, as there is no atmosphere.
3.   Deadly Radiation: the area in the fireball is exposed to extreme radiation. Every 2 scales away is affected by radiation of one step lighter  so, at +3 scales there is extreme radiation, +5 scales is heavy, +7 (the shockwave€s blast) is moderate, +9 is light, and +11 (2,000 times the area of a conventional weapon) is minor.
4.   The electro-magnetic pulse. Everywhere in a +11 scale area takes 1d6 + 3 EMP damage. EMPs are not created from nuclear explosions except on a planet with an atmosphere similar to Earth€s

The blast radius is increased by 2 scale categories and damage by +30. Anything within +2 scale categories of that blast radius is affected by 1d6+2 EMP damage. Damage type becomes Bludgeoning and Heat, whichever would be most effective.