Zombie Apocalypse Addon

Zombie Apocalypse Addon

Turn Minecraft into a configurable zombie survival world where daytime is not automatically safe.

Zombie Apocalypse Addon adds custom zombie waves, hordes, blood moons, day-based difficulty, optional siege behavior, kill milestones, and broad zombie-mod compatibility. It works for a simple survival server out of the box, while still providing deep controls for apocalypse packs.

Quick Info

• Multiplayer: install on the server only. Players can join without the mod.
• Singleplayer: install on the client because singleplayer runs a local server.
• Current targets: NeoForge 1.21.1, NeoForge 1.20.1, and Forge 1.20.1.
• Commands: anyone can read dashboards, help, stats, status pages, and current setting values. Changes require permission level 2.
• Config: config/zombieapocalypseaddon-common.toml.
• Safe defaults: block breaking, block placing, zombie towering, and animal hunting are off.

Start Here

After installing the correct jar, join as an operator and run:

/za

This opens a short dashboard showing the current day, custom waves, light protection, events, scaling, and optional world-pressure features.

For a fast setup, choose one gameplay preset:

/za preset casual
/za preset standard
/za preset hardcore

• Casual: fewer zombies, a 10-day daylight grace, no baby zombies.
• Standard: the recommended balance. A fresh install already uses it.
• Hardcore: faster waves, bigger events, and quicker difficulty growth.

| | Casual | Standard (fresh install) | Hardcore | |---|---|---|---| | Wave checks | every 9 s, 25% chance | every 6 s, 50% chance | every 4 s, 75% chance | | Zombies per wave / cap near each player | 1 / 30 | 2 / 50 | 3 / 80 | | Daytime waves start on | day 10 | day 1 | day 0 | | Lit areas | any light blocks waves | any light blocks waves | light is ignored | | Night spawn chance | x1.25 | x1.5 | x2.0 | | Baby zombies | 0% | 5% | 8% | | Hordes (at dusk) | every 7 days, 25% chance, 6 min | every 5 days, 50% chance, 10 min | every 3 days, 75% chance, 12 min | | Horde strength | x2.0 chance, 3 per wave | x3.0 chance, 5 per wave | x4.0 chance, 8 per wave | | Blood moons | 5% of nights, x3.0, 2 per wave | 15% of nights, x5.0, 4 per wave | 25% of nights, x6.0, 6 per wave | | Difficulty scaling | day 10 to 75 | day 3 to 50 | day 1 to 40 | | Full-strength bonuses | +10% speed, +6 health, 15% armor, 10% weapon | +20% speed, +10 health, 30% armor, 20% weapon | +30% speed, +16 health, 45% armor, 35% weapon |

All three keep block breaking, block placing, towering, and animal hunting as you set them, and leave advanced attribute values alone. A preset replaces the settings in this table, so apply it first and tune afterward.

Use /za help for short topic-based help instead of a wall of commands. Press Tab after /za to browse every system and get suggestions for states, values, players, attribute keys, and blocks.

Common Tweaks

Most things players ask for are one command away:

| I want to... | Run this | |---|---| | Keep zombies out of my torch-lit base | Nothing - lit areas are protected by default. /za spawn maxlight -1 disables it. | | Stop custom spawns during the day | /za spawn daytime off | | Have hordes arrive at dawn instead of nightfall | /za events dusk off (hordes arrive at dusk by default) | | Make the first day dangerous too | /za spawn daylightstart 0 (day 0 is safe in daylight by default) | | Skip time without resetting the apocalypse day | /time add 12000, or /za day set <day>. Vanilla /time set resets the day counter to 0. | | Make zombies jump in strength after every horde | /za scaling steps 10 with /za events interval 10 | | Get bigger waves as the days go on | /za scaling extrazombies 4 | | Let zombies break or build only during hordes and blood moons | /za breaking events on or /za placing events on, plus a high startday (see Siege Nights below) | | Remove baby zombies | /za spawn babychance 0 | | Make it easier or harder overall | /za preset casual or /za preset hardcore | | Let zombies break stone and ores | /za breaking on, then /za breaking toolblocks on and /za breaking hardness 50 | | Have zombies hunt animals and grow stronger | /za hunt on | | Give zombies armor or weapons from another mod | Hold the item and run /za gear add <tier>, then /za gear preview <tier> | | Change how often zombie gear drops | /za gear dropchance 0.25 (default 0.085) | | Keep my settings for every new world | Nothing - the common config applies to all worlds automatically. |

Every on command keeps your other settings. If one value would stop the feature from working, such as a 0% chance, on fixes just that value and tells you what it changed. /za config reset <section> puts a whole section back to its defaults when you want that.

Main Features