Zombie Apocalypse Addon

Turn your Minecraft world into a nonstop survival scenario.

This mod removes the “safe daytime” feeling by spawning zombie-type mobs around players all day and night. As in-game days pass, those mobs get more dangerous through scaling and configurable attribute systems.

If you want tension at all times instead of a peaceful daytime loop, this mod is built for that.

What This Mod Changes

Zombies can be configured to ignore sunlight burning (enabled by default).
Zombie-class mobs spawn around survival players day and night.
Horde events can occur naturally or be started manually.
Blood moon nights can occur randomly or be forced manually.
Difficulty scaling increases pressure over time.
Advanced attribute modifiers let you tune enemy stats deeply.
Biome and dimension context profiles let stats change by location.
Most behavior is configurable live with commands.
Config file includes extensive comments and safe ranges.

This is not “just more zombies.” It is a complete configurable zombie-pressure system.

Core Gameplay Systems

1) Constant Threat Spawning

Custom spawning can run 24/7 near players.
You control:

how often spawn checks happen
chance of a spawn wave
how many mobs per wave
per-player nearby cap
how far from players mobs can spawn
how many spawn position attempts are made per mob

Result: day and night are both dangerous, and pressure can be tuned for casual servers or hardcore worlds.

2) Horde Events

Hordes are timed high-pressure events:

increased spawn intensity
larger wave sizes
configurable duration and frequency
optional on-screen alerts for players

Admins can force-start or stop hordes with commands.

3) Blood Moon Nights

Every night can roll a blood moon chance:

stronger spawn pressure than normal nights
stacks with other multipliers
can be forced by command now/tonight

4) Difficulty Scaling Over Days

The mod can scale enemy pressure as days pass:

legacy scaling fields for movement speed and health boost
full attribute scaling through the new attribute system
configurable start day and max day for progression curve

This creates a “race against time” survival feeling.

5) Variant and Biome Spawn Logic

Spawn composition can change by biome:

deserts/badlands: more husks
water biomes: more drowned
mushroom fields can be safe zones (configurable)

Optional custom spawning in Nether and End is supported.

6) Death Cooldown

After a player death, spawn pressure can be reduced temporarily to prevent repeated instant deaths and frustration loops.

7) Stats, Effects, and Drops

kill tracking
cooldown tracking
optional atmospheric spawn particles/sounds
optional extra drops
optional debug logging for troubleshooting

Advanced Attribute System (Deep Explanation)

This mod now includes a layered attribute pipeline for mod-spawned zombie-class mobs:

Health
Attack damage
Movement speed
Armor
Follow range
Knockback resistance

Attribute Layer Order

For each spawned mob, attribute value flow is:

start from vanilla base value
apply base profile (global for all spawned zombie-class mobs)
apply variant profile (zombie/husk/drowned/zombie villager) if enabled
apply context multipliers (biome/dimension) if enabled
apply attribute day-scaling (if enabled)
apply legacy scaling compatibility values (health/speed)
clamp to safe min/max values

Why This Matters

You can now tune difficulty in a controlled way:

“All mobs are 15% faster globally”
“Husks hit harder than regular zombies”
“Drowned are tankier in water biomes”
“Nether spawns are faster and more aggressive”
“Late-game scaling increases follow range so mobs detect players sooner”

Biome and Dimension Context Profiles

Context profiles multiply attributes based on spawn location.

Contexts:

desert
water
mushroom
nether
end

If multiple contexts apply, multipliers stack multiplicatively.

Example:

Desert speed multiplier = 1.10
Nether speed multiplier = 1.20
Spawn in Nether desert-like context => combined speed multiplier ≈ 1.32

Commands (Full Reference)

All commands require OP level 2.

General

Command	What it does
`/zhelp`	Shows built-in command help.
`/zburn <true\|false>`	Controls zombie daylight burning. `true` means they burn in daylight, `false` means they do not.
`/zkill`	Removes all zombie-class entities from loaded levels.

Events

Command	What it does
`/zhorde start`	Starts a horde event immediately.
`/zhorde stop`	Stops the active horde event.
`/zhorde status`	Shows horde/blood-moon state and active spawn multiplier.
`/zbloodmoon`	Forces blood moon now if night, or queues it for tonight if day.

Stats

Command	What it does
`/zstats`	Shows your own stats if run by player; server summary if run from console.
`/zstats <player>`	Shows stats for a specific player.
`/zstats all`	Shows server totals.
`/zstats clear`	Clears all tracked stats/cooldown state.

Scaling

Command	What it does
`/zscaling status`	Shows current scaling day/factor and attribute system status.

Spawn Settings (`/zdayspawn`)

Command	What it does
`/zdayspawn status`	Prints full spawn/settings summary.
`/zdayspawn enabled <true\|false>`	Master toggle for custom spawning.
`/zdayspawn chance <0.0-1.0>`	Spawn-wave chance per spawn interval.
`/zdayspawn interval <ticks>`	Normal spawn interval.
`/zdayspawn eventinterval <ticks>`	Spawn interval during horde/blood moon.
`/zdayspawn amount <1-50>`	Zombies attempted per wave.
`/zdayspawn attempts <1-40>`	Spawn position attempts per zombie.
`/zdayspawn max <1-500>`	Max nearby zombie-class mobs per player.
`/zdayspawn range <16-128>`	Horizontal spawn range around player.
`/zdayspawn mindist <8-64>`	Minimum spawn distance from player.
`/zdayspawn sky <true\|false>`	Overworld spawn requires open sky.
`/zdayspawn variants <true\|false>`	Enable variant spawning logic.
`/zdayspawn nightboost <true\|false>`	Enable night spawn chance boost.
`/zdayspawn horde <true\|false>`	Enable horde system.
`/zdayspawn hordechance <0.0-1.0>`	Chance scheduled horde day starts a horde.
`/zdayspawn bloodmoon <true\|false>`	Enable random blood moon system.
`/zdayspawn scaling <true\|false>`	Enable day-based scaling.
`/zdayspawn attributes <true\|false>`	Enable advanced attribute modifier system.
`/zdayspawn attributescaling <true\|false>`	Let attribute values scale by day factor.
`/zdayspawn variantprofiles <true\|false>`	Enable per-variant attribute profiles.
`/zdayspawn contextprofiles <true\|false>`	Enable biome/dimension context multipliers.
`/zdayspawn biomes <true\|false>`	Enable biome-based variant chance modifiers.
`/zdayspawn nether <true\|false>`	Allow custom spawning in Nether.
`/zdayspawn end <true\|false>`	Allow custom spawning in End.
`/zdayspawn cooldown <true\|false>`	Enable death cooldown system.
`/zdayspawn effects <true\|false>`	Enable spawn particles/sounds.
`/zdayspawn debug <true\|false>`	Enable debug logging.

Live Attribute Commands (`/zattr`)

Command	What it does
`/zattr status`	Shows attribute/scaling status summary.
`/zattr keys`	Shows key-group format guide.
`/zattr keys all`	Prints all available numeric and toggle keys.
`/zattr get <key>`	Reads one numeric key value.
`/zattr set <key> <value>`	Live-updates one numeric key value.
`/zattr toggle <key> <true\|false>`	Live-updates a supported boolean toggle key.

Uncommon Terms (Glossary)

Term	Meaning
Zombie-class	Zombie, Husk, Drowned, Zombie Villager.
Key	The exact setting identifier used by `/zattr get` and `/zattr set`. Example: `base.health.multiplier`.
Toggle key	A boolean key used by `/zattr toggle`. Example: `attributes.enabled`.
Multiplier	A percentage-like scale factor. `1.0` = unchanged, `1.25` = +25%, `0.8` = -20%.
Bonus	Flat amount added/subtracted after multiplier.
Context profile	Attribute multipliers that apply in specific biome/dimension contexts.
Variant profile	Attribute profile for one mob variant (zombie/husk/drowned/villager).
Scaling factor	Day progression value from 0.0 to 1.0 based on your scaling start/max days.
Legacy scaling	Older compatibility scaling fields (`legacy.speedMultiplier`, `legacy.healthBonus`).
Spawn interval	Time between spawn checks. 20 ticks = 1 second.
Spawn attempts	Number of location tries per mob to find valid spawn points.
Per-player cap	Max nearby zombie-class mobs around each player before new spawns are skipped.

`/zattr` Key Format Guide

General shape:

group.subject.attribute.mode

Examples:

base.health.multiplier
variant.husk.attack.bonus
context.nether.speed.multiplier
legacy.healthBonus

Numeric Key Groups

base.<health|attack|speed|armor|follow|knockback>.<multiplier|bonus>
scale.<health|attack|speed|armor|follow|knockback>.<multiplier|bonus>
variant.<zombie|husk|drowned|villager>.<health|attack|speed|armor|follow|knockback>.<multiplier|bonus>
context.<desert|water|mushroom|nether|end>.<health|attack|speed|armor|follow|knockback>.multiplier
legacy.<speedMultiplier|healthBonus>

Toggle Keys

attributes.enabled
attributes.scaling
attributes.variantProfiles
attributes.contextProfiles

Full Numeric Key List (Current Build)

Base

base.health.multiplier
base.health.bonus
base.attack.multiplier
base.attack.bonus
base.speed.multiplier
base.speed.bonus
base.armor.multiplier
base.armor.bonus
base.follow.multiplier
base.follow.bonus
base.knockback.multiplier
base.knockback.bonus

Scale

scale.health.multiplier
scale.health.bonus
scale.attack.multiplier
scale.attack.bonus
scale.speed.multiplier
scale.speed.bonus
scale.armor.multiplier
scale.armor.bonus
scale.follow.multiplier
scale.follow.bonus
scale.knockback.multiplier
scale.knockback.bonus

Variant Zombie

variant.zombie.health.multiplier
variant.zombie.health.bonus
variant.zombie.attack.multiplier
variant.zombie.attack.bonus
variant.zombie.speed.multiplier
variant.zombie.speed.bonus
variant.zombie.armor.multiplier
variant.zombie.armor.bonus
variant.zombie.follow.multiplier
variant.zombie.follow.bonus
variant.zombie.knockback.multiplier
variant.zombie.knockback.bonus

Variant Husk

variant.husk.health.multiplier
variant.husk.health.bonus
variant.husk.attack.multiplier
variant.husk.attack.bonus
variant.husk.speed.multiplier
variant.husk.speed.bonus
variant.husk.armor.multiplier
variant.husk.armor.bonus
variant.husk.follow.multiplier
variant.husk.follow.bonus
variant.husk.knockback.multiplier
variant.husk.knockback.bonus

Variant Drowned

variant.drowned.health.multiplier
variant.drowned.health.bonus
variant.drowned.attack.multiplier
variant.drowned.attack.bonus
variant.drowned.speed.multiplier
variant.drowned.speed.bonus
variant.drowned.armor.multiplier
variant.drowned.armor.bonus
variant.drowned.follow.multiplier
variant.drowned.follow.bonus
variant.drowned.knockback.multiplier
variant.drowned.knockback.bonus

Variant Villager

variant.villager.health.multiplier
variant.villager.health.bonus
variant.villager.attack.multiplier
variant.villager.attack.bonus
variant.villager.speed.multiplier
variant.villager.speed.bonus
variant.villager.armor.multiplier
variant.villager.armor.bonus
variant.villager.follow.multiplier
variant.villager.follow.bonus
variant.villager.knockback.multiplier
variant.villager.knockback.bonus

Context Desert

context.desert.health.multiplier
context.desert.attack.multiplier
context.desert.speed.multiplier
context.desert.armor.multiplier
context.desert.follow.multiplier
context.desert.knockback.multiplier

Context Water

context.water.health.multiplier
context.water.attack.multiplier
context.water.speed.multiplier
context.water.armor.multiplier
context.water.follow.multiplier
context.water.knockback.multiplier

Context Mushroom

context.mushroom.health.multiplier
context.mushroom.attack.multiplier
context.mushroom.speed.multiplier
context.mushroom.armor.multiplier
context.mushroom.follow.multiplier
context.mushroom.knockback.multiplier

Context Nether

context.nether.health.multiplier
context.nether.attack.multiplier
context.nether.speed.multiplier
context.nether.armor.multiplier
context.nether.follow.multiplier
context.nether.knockback.multiplier

Context End

context.end.health.multiplier
context.end.attack.multiplier
context.end.speed.multiplier
context.end.armor.multiplier
context.end.follow.multiplier
context.end.knockback.multiplier

Legacy

legacy.speedMultiplier
legacy.healthBonus

Practical Examples (For Non-Technical Users)

Make all spawned mobs slightly tankier:
/zattr set base.health.multiplier 1.15
Make only husks hit harder:
/zattr set variant.husk.attack.multiplier 1.30
Make drowned faster in water areas:
/zattr set context.water.speed.multiplier 1.20
Disable biome/dimension context effects quickly:
/zattr toggle attributes.contextProfiles false
Check current value before changing:
/zattr get variant.drowned.armor.multiplier
List all keys if unsure:
/zattr keys all

Installation Notes

Intended for NeoForge servers/worlds matching this release branch.
Keep server and player mod setups aligned for best compatibility.
For troubleshooting, enable debug logs with:
/zdayspawn debug true

ZombieApocalypseAddon