Story

The world is radioactive, only a few people were able to save themselves and escaped into a cave. They only had a few animals and basic things like wheat and water. Now, they have to survive, the overworld is contaminated forever. Only an expensive suit can protect from radiation; the radiation is less great at night.

Here's a trailer I made a year ago for my own server:

This game is great for co-op & trading! It's more hard to get enough items to survive!

Features

players receive damage when the light level is higher than 15 (if they are in a water block: level 12)
radiation suits (full (modified) diamond armor) prevents from beeing damaged by the sunlight
multiworld support
permission to bypass the damage (can be disabled)

Usage

To craft a radiation suit, a diamond armor part with 8 (configurable) emeralds has to be put in the crafting field (it's a shapeless recipe): You need a Radiation Helmet, Radiation Chestplate, Radiation Leggings and Radiation Boots in order to be protected from radiation.

How to

create a new map with big cave with animals, farms and whatever you like; don't forget to set the spawn point there
set difficulty to normal; otherwise, it's boring
install the plugin (instructions below)

Configuration

Just copy RadioactiveWorld.jar into your plugins-folder. Config files will be created on first run.

config.yml

worlds: list of worlds in which the plugin will be active
permission: boolean; if set to false, the permissions will have no effect
armorcost: integer; from 0 to 8: number of emeralds needed for crafting a part of a suit
playerdamage: integer; player's damage per tick
armordamage: float; damage of the radiation suit per tick

Permissions

RadioactiveWorld.bypass: disables the plugin for the player

Radioactive World