Cataclysm Era
by NoraLunan
Cataclysm Era changes how zombies behave over the course of a world, scaling their stats with the in-game day count on Forge for 1.20.1.
What it does
Zombies in Cataclysm Era receive power-ups after 10 in-game days, and the day count is shown on screen in the morning. Zombies lose their weakness to sunlight and are immune only to sunburn and fire damage. A small share of zombies can spawn invisible, and from the mid to late game some carry Totems of Undying or wear netherite armor. Zombies also replace some of the vanilla monsters, and the 10th night becomes a special night event.
The mod is built for hardcore post-apocalyptic survival, and the author recommends pairing it with other zombie-enhancing mods. Most of its adjustable values can be changed in a configuration file. If Enhanced Celestials is installed, the 10th night sets a Super Moon. Servers that run it need every player to install it too. It is published for Forge only, for 1.20.1, with 1.2.1 as the latest beta file, and it is released under All rights reserved, so it is not open source.
Key features
Time-scaled zombie stats
Zombie stats are adjusted according to the in-game time, without changing the zombie entity itself.
Day counter display
The current in-game day count is shown, so players can track when the next power-up arrives.
Varied zombie loadouts
Some zombies spawn invisible, and later in the game others hold Totems of Undying or wear netherite armor.
Wider zombie drops
Zombies drop a broader variety of items, and some vanilla monsters are replaced by zombie variants.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Hardcore survival runs
Players seeking a harsher post-apocalyptic world can let zombies grow stronger as the days pass.
Zombie-focused modpacks
The mod is suggested alongside other zombie-enhancing mods in the same pack.
Who it’s for: Players who want escalating zombie threats in survival worlds, and server owners who run hardcore or modpack servers on Forge 1.20.1.
How it compares
Expensive Zombies is a Forge mod for 1.20.1 – 1.20.6, licensed under All rights reserved and run on client and server, so it covers a wider version span. Zombies+ supports Fabric and Forge for 1.20 – 1.20.4 under All rights reserved, also on client and server. PvZ, FasterZombies and Don't Go Too Far are all Forge mods for 1.20.1 under the MIT License, but each is server-side only, so players join without installing them.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Cataclysm Era | Forge | 1.20.1 | Client and server | 2026-05-28 |
| Expensive Zombies | Forge | 1.20.1 – 1.20.6 | Client and server | 2026-09-02 |
| Zombies+ | Fabric and Forge | 1.20 – 1.20.4 | Client and server | 2024-11-10 |
| PvZ | Forge | 1.20.1 | Server-side only | 2024-07-11 |
| FasterZombies | Forge | 1.20.1 | Server-side only | 2025-07-10 |
| Don't Go Too Far | Forge | 1.20.1 | Server-side only | 2026-06-20 |
Questions
Does Cataclysm Era need to be installed on the client?
Which version of Forge does Cataclysm Era support?
Does Enhanced Celestials change the 10th night?
In the catalog
Cataclysm Era is one of 11,058 Mobs mods on ModsFinder, and one of 6,527 Mobs mods for Forge. 34,764 mods support Minecraft 1.20.1.
More from NoraLunan
Similar mods
What the author says
This is a mod focused on hardcore post-apocalyptic survival. Its core feature lies in adjusting zombie stats based on in-game time, without any modifications to zombie AI. It is recommended to play alongside other zombie-enhancing mods. Key Features: - Displays the current in-game day count every morning. - Zombies…
Official listing
- Modrinth page
- modrinth.com/mod/cataclysm-era
- Owner
- NoraLunan
- Published
- 2026-05-14
- Updated on Modrinth
- 2026-05-28
- Facts verified
- 2026-10-15