There seem to be 3 common schools of thought on how to deal with radiation in games and fiction it seems like
1.) treat it as magic
2.) treat it as magic poison
3.) somewhat realistically portray it's deleterious effects on the health of living things but don't portray its effects on other things.
I'm eventually planning on introducing an NPC in a game I'm running who is passively just a bit below the boiling point of water and pumps out a lot of ionizing radiation. They can crank this up significantly.
They live in an exclusion zone on an island.
Though one better maintained then Pripyat or Fukushima because, instead of it being an abandoned developed area crumbling from neglect, it's a bunch of undeveloped land with a complex build for and maintained by a single person in the middle.
I try to go for a realistic portrayal of things like fire, air, water, radiation and such in my games.
So I've been searching for information on what radiation does to things and devices but haven't been finding much besides how UV rays from the sun fuck up plastics and ionizing radiation can cause digital video cameras to glitch and show artifacts.
I've found plenty on what radiation does to PEOPLE, but not their homes, clothes, and belongings, or what regular exposure (instead of one contaminating event from a bomb test or meltdown it's an unshielded reactor taking it's morning stroll through the same part of a forest, beach, or field every day for weeks, months, or years.) does to a place.
Would their wallpaper all be bleached? Would they go through a lot of clothes and bed covers? Can they own a phone, Gameboy, or PC or would they breakdown quickly?
I'm interested in this because whether the party figure out how to visit themselves, or send in a drone I want to figure out what physical signs this person would leave on their home environment and personal belongings to convey the dangerous and alienating condition of such a being.