CurseForge · Minecraft mod
How Rotten!
How Rotten! adds a new infection mechanic from zombie mobs to the game!
Quick answer
Which How Rotten! release should I use?
How Rotten! how_rotten-1.0.3-neoforge-1.21.1.jar targets 1.21.1 with NeoForge. The project page does not say whether this file belongs on the client, dedicated server, or both. No extra mods listed for this file.
Where it goes
Is How Rotten! required on the client, server, or both?
The project page does not say whether this file belongs on the client, dedicated server, or both.
The source does not explicitly classify this release as client-only or server-only.
What else does How Rotten! how_rotten-1.0.3-neoforge-1.21.1.jar need?
how_rotten-1.0.3-neoforge-1.21.1.jar. Change the file and its required mods may change too.
This file does not list any required mods. Do not add a library just because a different file uses it.
This file does not list any required or optional mods.
Before you install it
Add How Rotten! without breaking your instance.
Built for How Rotten! how_rotten-1.0.3-neoforge-1.21.1.jar. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use how_rotten-1.0.3-neoforge-1.21.1.jar. It targets 1.21.1 with NeoForge; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
This file does not list any required mods. Do not add a library just because a different file uses it.
- 03
Put it on the correct side
The project page does not say whether this file belongs on the client, dedicated server, or both.
- 04
Pick the file you checked
Use the “Get this file” button beside how_rotten-1.0.3-neoforge-1.21.1.jar. It opens that exact file at the source.
About this project
What does How Rotten! add?

How Rotten! adds a new infection mechanic from zombie mobs to the game!
Features (All Configurable)
Zombies have a chance to infect players. Zombie mobs use the entity tag "how_rotten:zombies" so you can add compatibility with other mods. The chance to get infected by default is 40% but can be configured.
Infection Effect. Slows players and forces them to eat rotten flesh. (Other foods can be add through the how_rotten:zombie_food item tag) The infection can spread through entities and players that attack each other.
When an infected entity, including players, kills a villager it turns them into a zombie villager. Can be toggled in the config.
Antidotes can be brewed with a Golden Apple and a Weakness Potion. They can be made into splash potions and lingering potions to cure zombie villagers or infected mobs and players!
New weapon, baseball bats! Stronger than swords, but slower attack speed. Quicker than axes.
Base defense with barbed wire and wooden spikes.
Project description from CurseForge.
Pick your setup
How Rotten! by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
1.21.1
1 loader buildCheck the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
How Rotten! versions and loaders
how_rotten-1.0.3-neoforge-1.21.1.jar
3 Aug 2026
how_rotten-1.0.3-neoforge-1.21.8.jar
3 Aug 2026
how_rotten-1.0.2-neoforge-1.21.8.jar
3 Aug 2026
how_rotten-1.0.2-neoforge-1.21.1.jar
3 Aug 2026
how_rotten-1.0.1-neoforge-1.21.1.jar
31 Jul 2026
how_rotten-1.0.1-neoforge-1.21.8.jar
31 Jul 2026
how_rotten-1.0.0-neoforge-1.21.8.jar
28 Jul 2026
how_rotten-1.0.0-neoforge-1.21.1.jar
28 Jul 2026
Looking for an older file? The official CurseForge project page is in Resources.