Posted in 2018
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Role Playing Games,
Gamma World,
Dungeons & Dragons,
and Draft
https://tedt.org/2018/04/25/Nukes-and-Radiation-in-Dungeons-and-Dragons-5th-Edition-for-Gamma-World/
This work is incomplete. It still needs to be drawn together and form a consistant whole. I plan on having two systems for Radiation Damage in my D&D 5e Gamma World system. The first is a realisitic system that will be used for dramatic purposes. This will be a system that will model the idea of someone who is so radiated that they are going to die, but it will take them weeks or months to do so. This will give the player the option of finding a cure with some sort of Ancient Tech or revenge a wrong before dying. The other system will mirror the radiation systems found in 1st and 2nd editions of Gamma World. This system is not complete yet, as the math is still being done. This second system will basically set a CON Save vs a DC that is based on the Radiation Intensity plus any modifiers based on armor or whatnot and give you an outcome that can either be mitigated by damage, mutation, or exhaustion effects. I also plan on having a new damage type that will track to radiation damage in the realistic / dramatic system. Radiation Damage effects will be able to be mitigated by Ancient Tech Medicine whcih will either repair your radiation stat or your remove various effects and negative bonuses to CON rolls.
Nukes and Radiation in Gamma World
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Radiation Damage
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A New Stat
Every character in Gamma World has a new stat that accounts for the amount of radiation damage they can take. This stat is based on a creatures constitution and increases or decreases as that creatures constitution increases or decreases. This new stat is called Rads. To calculate the number of rads a creature has take it’s CON and multiply it by 100. For example if a character has a constitution of 10 then they have a Rads of 1000. Once you have this value you will multiply it by a modifier as found in the table below based on the characters size.
Size
Multiplier
Tiny
x1/4
Small
x1/2
Normal
none
Large
x2
Huge
x3
Gargantuan
x4
Damage to your Rads
You reduce the amount of Rads you have when you encounter radiation in Gamma World. This radiation might be in the form of fallout from the bombs the ancients dropped or from creatures in Gamma World. What makes Radiation damage so dangerous is that only the Ancients knew how to cure radiation damage.
Nauseaed:
A nauseated creature can’t take actions or reactions.
A nauseated creature has disadvantage on attack rolls and ability checks.
A nauseated creature automatically fails all saving throws except those made to shaking off these effects.
Anorexia
An Anorexiad character must make a Wisdom check (DC?) every time they try to eat. When they fail, they are unable to eat. On a sucess the character consumes half rations.
An anorexiad character follows normal 5e Rules for lack of nutrition / water.
Vomiting
A vomiting character must make a Con Check (DC?)1D4 minutes after they finish eating. On a fail, they vomit up their food and water and recieve no nutritional value from the food and only half rations value for the water. If the character was already drinking 1/2 rations, they get no nutritional value.
A Vomiting character follows normal 5e rules for lack of nutrition / water.
Diarrhea
A character with Diarrhea must make a Con Check (DC?) 1D4x10 minutes after they finish eating. On a fail, they pass their food and water out of their body and recieve no nutritional value from the food. This check is in addition to a check for a character who is Vomiting. If a character has failed their Con Check for Vomiting, they will not need to roll for Diarrhea.
A character with Diarrea follows normal 5e rules for lack of nutrition / water.
Watery Diarrhea
A character with Diarrhea must make a Con Check (DC?) 1D4x10 minutes after they finish eating. On a fail, they pass their food and water out of their body and recieve no nutritional value from the food and the food. This check is in addition to a check for a character who is Vomiting. If a character has failed their Con Check for Vomiting, they will not need to roll for Diarrhea.
A character with Diarrea follows normal 5e rules for lack of nutrition / water.
Bleeding
A character who is bleeding from ionization damage must make a Con Check (DC?) every hour or lose 1 hitpoint.
or A character who is bleeding from ionization damage must make a Con Check (DC?) every day or lose 3D6. On a sucessful roll, lose half that.
Convultions
A Character with Convultions must make a Con Check (DC?) every hour. On a fail the creature can’t take actions or reactions and they take 1d4-2 damage if they are restrained carefully, otherwise they take 1d4 damage.
Damage from Radiation based on the Center for Desiese Control studies on Ionization Damage from Radiation.
Prodromal Stage
Syndrome
Low Dose
High Dose
Onset
Length
Symptoms
Hematopoietic (Bone Marrow)
30
70
7D6-6 Hours
1D12 days
Anorexia, Nausea, and Vomiting
Gastrointestinal (GI)
600
1000
1d4 hours
1d4*10+1d8 hours
Anorexia, Nausea, Vomiting, Diarrhea, one level of exhaustion
Cardiovascular (CV)
2000
5000
1d4 minutes
1d4 hours
Vomiting, watery diarrhea
Central Nervous System (CNS)
2000
5000
1d4 minutes
1d4 hours
Nausea, Vomiting, Unconscious,
Latent Stage
Syndrome
Low Dose
High Dose
Length
Symptoms
Hematopoietic (Bone Marrow)
30
70
1d6 weeks
Suffers from one level of exhaustion
Gastrointestinal (GI)
600
1000
1d8 days
One Level of Exhaustion
Cardiovascular (CV)
2000
5000
1d4 hours
One Level of Exhaustion
Central Nervous System (CNS)
2000
5000
1d4 hours
One Level of Exhaustion
Manifest Illness Stage
Syndrome
Low Dose
High Dose
Length
Symptoms
Hematopoietic (Bone Marrow)
30
70
1d3 + 1 months
Anorexia and One Level of Exhaustion.
Gastrointestinal (GI)
600
1000
1d4/2
Anorexia, Diarrhea, One Level of exhaustion
Cardiovascular (CV)
2000
5000
1d4 days
Watery diarrhea, Convulsions, Max level of Exhaustion
Central Nervous System (CNS)
2000
5000
1d4 days
Watery diarrhea, Convulsions, Max level of Exhaustion
Recovery Illness Stage
Syndrome
Low Dose
High Dose
Recovery Time
Symptoms until Recovery
Hematopoietic (Bone Marrow)
30
70
1d100 weeks
Suffers from one level of exhaustion
Gastrointestinal (GI)
600
1000
Death
Generally there is no recover stage
Cardiovascular (CV)
2000
5000
Death
Generally there is no recover stage
Central Nervous System (CNS)
2000
5000
Death
Generally there is no recover stage
Damage from a Nuke
The following information is based on real world physics for weapons and the amount of damage structures can take in Gamma World. Ranges are listed in Feet.
Blast Damage (Thunder, Bludgeoning, and Force Damage)
Description
PSI
Damage
10000 psi / surface (destruction of even very hardened silos)