ModpacksJava
Butterfly Effect
A lightweight yet plentiful modpack combining the feel of beta Minecraft with modern features and mods. Create included!
⬇ Download on Modrinth
Quick facts
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: 1.20.1
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
Verified by MCModsHub
- Downloads as Butterfly Effect 1.3-3.14.26.mrpack
- Download size: 8.5 MB
- Download link checked 9 Sept 2026 — working
These come from our own check of the pack file, not from the source page.