Zombie Apocalypse Core [ZAC]
by rd342
Zombie Apocalypse Core [ZAC] changes how zombies behave, so that a world can be played as a survival apocalypse with tougher, more destructive undead.
What it does
Zombies can break blocks, and the set of blocks they can break is set by blockMinimumHardness and blockMaximumHardness in the config. The default range lets them destroy soft blocks such as dirt, while harder blocks like obsidian stay out of reach unless the maximum is raised. Zombies also gain heavier armor, and their drops can be changed so that items are dropped with a set chance.
The mod includes a day counter that tracks how many days a world has run, and a daylight resistance option that keeps zombies active in daytime. An entity blocklist stops selected mobs from spawning, and an entity multiplier increases how many zombies appear. Changes are made in the config file, which accepts lists and numeric values.
The server and every player need the mod installed. It is published for Fabric, Forge and NeoForge, with builds for 1.20.1 and 1.21.1, and Fabric API is required on Fabric. The code is open source under the GNU General Public License v3.0 only.
Key features
Zombies break blocks
Zombies can destroy blocks within a configurable hardness range, so the damage they cause can be tuned to the server.
Heavily armored zombies
Zombies spawn with heavier armor, which makes them harder to defeat in close combat.
Additional zombie drops
Zombie drops can be customized, with each item set to a chance expressed as a percentage.
Day counter and daylight resistance
A day counter tracks the age of the world, and zombies can keep their strength during daylight hours.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 1
How it compares
Zombie Break & Build is also open source, under the GNU Lesser General Public License v3.0 only, and runs on Fabric, Forge and NeoForge for 1.20.1 – 26.3, but it is server-side only, so players do not need it. TNT's Zombie Apocalypse is a Forge server-side mod under the MIT License for 1.20.1 – 1.21.1, and it is not open source. NoUpgradeNetherite is a client and server mod for Fabric, Forge and NeoForge, but it is not open source and is released under All rights reserved.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Zombie Apocalypse Core [ZAC] | Fabric, Forge and NeoForge | 1.20.1 – 1.21.1 | Client and server | 2025-11-12 |
| Zombie Break & Build | Fabric, Forge and NeoForge | 1.20.1 – 26.3 | Server-side only | 2026-09-22 |
| TNT's Zombie Apocalypse | Forge | 1.20.1 – 1.21.1 | Server-side only | 2024-12-10 |
| NoUpgradeNetherite | Fabric, Forge and NeoForge | 1.20.1 – 1.21.8 | Client and server | 2026-04-19 |
Questions
Does Zombie Apocalypse Core need Fabric API?
Does the server need the mod, or can players join without it?
Which Minecraft versions are supported?
How is the drop chance for an item set?
In the catalog
Zombie Apocalypse Core [ZAC] is one of 11,058 Mobs mods on ModsFinder, and one of 5,189 Mobs mods for Fabric. 32,366 mods support Minecraft 1.21.1.
Similar mods
What the author says
Necessity for zombie apocalypse modpacks. Continuation of the Zombie Apocalypse Core mod.
Official listing
- Modrinth page
- modrinth.com/mod/zac
- Owner
- rd342
- Published
- 2025-10-26
- Updated on Modrinth
- 2025-11-12
- Facts verified
- 2026-10-15