This Addon adds a few new thinks to your world, which make it harder to survive, but also a bit more realistic.
The idea is it, that there was a nuclear catastrophe a now the most of all other people are zombies and you are one of the last survivors.

(You can play this addon in multiplayer)

How to install

First of all add the function to your world.
Then type in your ingame chat/function install

You will get a structure block and the same short following instruction (and it makes some other settings for the functions, so it`s necessary to run it one time at the beginning):
1. place the structure block
2. turn it intoLoad
3. type inengine
4. click onLoad

This will load a little structure and the Addon will automatically start and run.

What is added

• at the beginning you get some start equipment
  

   

• temperature and thirst
  (used from these creators, but improved:Temperature    Thirst)
  
  >if thirst is too low you get negative effects (and no positive effects anymore when filled), so it has to be refilled from time to time by standing in any water block or a cauldron with water

  in a desert or in the nether  you have to quench your thirst more often

  >if temperature is too high or too low you also get negative effects

  temperature goes high:
  torch
  campfire
  lantern
  lit furnace
  lit blast furnace
  lit smoker
  sand/red sand
  magma stone
  lava/flowing lava
  fire
  blocks in the nether (netherrack, soul sand, soul soil, blackstone, …)
  soul campfire
  soul lantern
  soul torch
  soul fire

  temperature goes low:
  snow/snow layer
  ice/packed ice/ blue ice
  at night
  in caves
  while a blizzard (blizzard see below) only V1

  temperature goes to optimum:
  water/flowing water
  cauldron with water
  in a registered house (registered houses see below)

• radioactive rain
  Sometimes there is radioactive rain which gives you some positive and some negative effects, but you are safe in caves, in the nether, in the end, in deserts and in a registered house.
  
• blizzard only V1
  They only appear if you are in a snowy terrain for a longer time, but then they can spread out in every other biome.
  They lower your temperature drastically and you are only safe in caves, under water, in the nether, in the end and in a registered house.
  
• fog only V1
  Every morning there is a possibility that fog appears (can`t appear in the end, in the nether, in deserts, in caves, under water and in registered houses).
  Fog isn`t as dangerous as blizzards, because he has no effect on your temperature or anything else, but he also restricts your view.
  
• hunger
  every morning you get hunger for a few seconds
  
• zombies
  >all villager are now zombie villager
  >all zombies, zombie villager, husks and drowned are faster, more powerfull and can`t burn
  >If you sleep too late at night, at the same night or at the next day there appears a zombie villager/husk/drowned (depends on the biome you are) horde near you with at least on leader. After you killed the leader you get some positive effects.
  
• pillager
  Pillager represent survivor, which attack other survivor (the player) when they meet them. Because of this there sometimes appears a pillager horde near you (they also have a leader).
• pigs and piglins only V2
  all pigs and piglins are transformed into zombiefied piglins

   

• hoglins only V2
  all hoglins are transformed into zoglins
• horses only V2
  all horses are transformed into zombie horses

  

• virus
  Because of the nuclear catastrophe there is a new virus, which spreads out from time to time. It is transferable through the air in a specific radius from zombies, zombie villagers, husks, drowneds, chickens, cows, sheeps and pigs to the player and can kill the player (only if you can`t heal enough). To avoid the virus, keep enough distance to the transmitters or kill them.
  
• houses
  There are a few buildings registered as houses. In this houses you are safe from temperature, (fog, blizzards,) radioactive rain and mobs.
  For this houses I partly used my ownTravel Base Function Pack.
  I used Version 3 and added the normal simple tent, the caravan, the desert tent, the garden hut, the igloo, the jungle tent and the modern tent to this function.
  Attention:don`t run both functions (travel base and apocalypse) in one world at the same time. This could crash one of them. The reference to the travel base function pack is only in this text, to show you how to activate/spawn these houses.
• ghost lights only V2
  >Ghost Lights are new mobs. which have no real significance, they were just an idea and i think they are really cool. They look a bit like vexes, but have no sword, some particles, a bit other texture, can`t fly through blocks and make some mysterious noises (they sound like ghasts, blazes, vexes, phantoms, soul particles or a nether portal).
  >can spawn in forests, mushroom biomes, savannas, swamps, plains and in the nether (except in basalt deltas).
  >attack damage: 1, health: 10
  >in a radius of 10 blocks they cause a player slowness, wither, weakness, mining fatigue and lower the temperature
  
• fireflies
  Here you need an extra addon calledFirefly Addon.
  It isn´t really necessary but you can add this addon also to your world.
  So you would have a completely new mob and I also added some effects you get when you are near to such a firefly.
  
• death counter only V2
  you can turn it on/off at the structure you have to load at the beginning
  or type in your chat/scoreboard objectives setdisplay sidebar death_counter   (on)
  or/scoreboard objectives setdisplay sidebar  (off)

Please write a comment if you think something doesn`t work or if you have an idea what I could add to this function (for example some nice extensions to other mobs).

I hope you enjoy playing this function. 🙂

Downloads

• V1 - MCPACK (Mediafire)
• V2 BE - MCPACK (Mediafire)
• V2 RE - MCPACK (Mediafire)