Minecraft version
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CurseForge · Minecraft mod
Retromod
Retromod Is a Minecraft mod that allows you to play older mods on newer versions.
Choose a version Pick your version below, then grab the matching file.
Quick answer
Which Retromod release matches 1.21.6?
beta file Retromod 1.3.0-snapshot.9 (NeoForge 1.21.6)
Game version 1.21.6
Loader NeoForge
Retromod 1.3.0-snapshot.9 (NeoForge 1.21.6) targets 1.21.6 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 Retromod required on the client, server, or both?
The project page does not say whether this file belongs on the client, dedicated server, or both.
Client Source doesn’t say
Dedicated server Source doesn’t say
Loader for this release NeoForge
Required install it here Optional supported, not mandatory Not supported do not install here Source doesn’t say do not assume
The source does not explicitly classify this release as client-only or server-only.
What else does Retromod 1.3.0-snapshot.9 (NeoForge 1.21.6) need?
Retromod 1.3.0-snapshot.9 (NeoForge 1.21.6) on 1.21.6. Every mod below is checked against that same setup.
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 Retromod without breaking your instance.
Built for Retromod 1.3.0-snapshot.9 (NeoForge 1.21.6) on 1.21.6. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use Retromod 1.3.0-snapshot.9 (NeoForge 1.21.6). It targets 1.21.6 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 Retromod 1.3.0-snapshot.9 (NeoForge 1.21.6). It opens that exact file at the source.
About this project
What does Retromod add?
Retromod
Run mods built for older Minecraft versions on current ones.
Most compatibility layers move a mod between loaders. Retromod moves a mod between game versions. A mod built for 1.20.1 can run on a current release without waiting for the author to port it.
How it works
Drop Retromod in, put the old mod in retromod-input and launch. Retromod rewrites the mod's bytecode, remaps its names, repairs its mixins, and patches its loader metadata, then moves it into mods
Works on Fabric, NeoForge, and Forge.
Will my mod work?
Check the compatibility database first.
Best results: content mods, quality-of-life mods, libraries, recipe viewers.
Poor results: full list and the rules of thumb A mod that loads is not always a mod that fully works. Test it before you build a world on it.
Links
Made By Bownlux, a Dev of RevivalSMP.net
Project description from CurseForge.
Pick your setup
Retromod by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
Minecraft version
26.1.2
3 loader buildsMinecraft version
26.1.1
3 loader buildsMinecraft version
26.1
3 loader buildsMinecraft version
1.21.11
3 loader buildsMinecraft version
1.21.10
3 loader buildsMinecraft version
1.21.9
3 loader buildsMinecraft version
1.21.8
3 loader buildsMinecraft version
1.21.7
3 loader buildsMinecraft version
1.21.6
3 loader buildsMinecraft version
1.21.5
3 loader buildsMinecraft version
1.21.4
3 loader buildsShowing the newest 12 of 23 game versions. Older files are in the list below.
Check the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
Retromod versions and loaders
Retromod 1.3.0-snapshot.9 (NeoForge 1.21.6)
retromod-1.3.0-snapshot.9+1.21.6.jar
23 Aug 2026
Client Source doesn’t say Server Source doesn’t say Dependencies No extras listed Listed on Release listing
Check the 1.21.6 · NeoForge setup 1.21.6NeoForge beta
1.3.0-snapshot.9+1.21.6-neoforge
retromod-1.3.0-snapshot.9+1.21.6.jar
23 Aug 2026
Client Optional Server Optional Dependencies No extras listed Listed on Release listing
Check the 1.21.6 · NeoForge setup 1.21.6NeoForge beta
Retromod 1.3.0-snapshot.9 (Forge 1.21.6)
retromod-1.3.0-snapshot.9+1.21.6.jar
23 Aug 2026
Client Source doesn’t say Server Source doesn’t say Dependencies No extras listed Listed on Release listing
Check the 1.21.6 · Forge setup Forge1.21.6 beta
1.3.0-snapshot.9+1.21.6-forge
retromod-1.3.0-snapshot.9+1.21.6.jar
23 Aug 2026
Client Optional Server Optional Dependencies No extras listed Listed on Release listing
Check the 1.21.6 · Forge setup 1.21.6Forge beta
1.3.0-snapshot.9+1.21.6-fabric
retromod-1.3.0-snapshot.9+1.21.6.jar
23 Aug 2026
Client Optional Server Optional Dependencies No extras listed Listed on Release listing
Check the 1.21.6 · Fabric setup 1.21.6Fabric beta
1.3.0-snapshot.8+1.21.6-neoforge
retromod-1.3.0-snapshot.8+1.21.6.jar
18 Aug 2026
Client Optional Server Optional Dependencies No extras listed Listed on Release listing
Check the 1.21.6 · NeoForge setup 1.21.6NeoForge beta
1.3.0-snapshot.8+1.21.6-forge
retromod-1.3.0-snapshot.8+1.21.6.jar
18 Aug 2026
Client Optional Server Optional Dependencies No extras listed Listed on Release listing
Check the 1.21.6 · Forge setup 1.21.6Forge beta
Looking for an older file? The official CurseForge project page is in Resources.
