Quick answer
Which Synergy release should I use?
Updated 4 months ago Latest stable file 0.8.6-hotfix-2
Game version 1.21.1
Loader NeoForge
Synergy 0.8.6-hotfix-2 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 Synergy 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 Synergy 0.8.6-hotfix-2 need?
0.8.6-hotfix-2. Change the file and its required mods may change too.
No extra mods listed for this file This file does not list any required mods. Do not add a library just because a different file uses it.
20 listed on this file 8 pulled in by those mods
EvilCraft Optional for Synergy 0.8.6-hotfix-2 optional Matching file found Matched file: evilcraft-1.21.1-neoforge-1.2.97.jar
Matching file found Matched file: Draconic Evolution 1.21.1-3.1.4.633
Create Optional for Synergy 0.8.6-hotfix-2 optional Matching file found Matched file: Create 6.0.10 for mc1.21.1
Matching file found Matched file: ImmersiveEngineering-1.21.1-12.4.2-194
Matching file found Matched file: [NEOFORGE] FTB Materials 21.1.4
Ex Deorum Optional for Synergy 0.8.6-hotfix-2 optional Matching file found Matched file: Ex Deorum 3.12
Matching file found Matched file: botanypots-neoforge-1.21.1-21.1.44.jar
Matching file found Matched file: cloche-1.21.1-1.3.7.jar
Ender IO Optional for Synergy 0.8.6-hotfix-2 optional Matching file found Matched file: Ender IO - v8.2.12-beta
Matching file found Matched file: Farmer's Delight 1.3.4 - 1.21.1
Matching file found Matched file: supplementaries-1.21.1-3.9.9-neoforge
Mekanism Optional for Synergy 0.8.6-hotfix-2 optional Matching file found Matched file: Mekanism-1.21.1-10.7.19.85.jar
Jade 🔍 Optional for Synergy 0.8.6-hotfix-2 optional Matching file found Matched file: [NeoForge 1.21.1] 15.10.6
Matching file found Matched file: 19.57.0.450 for NeoForge 1.21.1
GuideME Optional for Synergy 0.8.6-hotfix-2 optional Matching file found Matched file: GuideME 21.1.19
XyCraft Optional for Synergy 0.8.6-hotfix-2 optional Matching file found Matched file: XyCraft Core v0.7.53 - Hot Fix
Matching file found Matched file: cyclopscore-1.21.1-neoforge-1.30.0.jar
Matching file found Matched file: Brandons Core 1.21.1-3.2.1.309
Matching file found Matched file: CodeChicken Lib 1.21.1-4.6.1.529
Matching file found Matched file: TheOneProbe - 1.21_neo-12.0.8
Matching file found Matched file: prickle-neoforge-1.21.1-21.1.11.jar
Matching file found Matched file: bookshelf-neoforge-1.21.1-21.1.81.jar
Matching file found Matched file: bblcore-1.21-1.3.20.jar
Matching file found Matched file: [NeoForge] Athena 4.0.6
8
extra mods were pulled in by other dependencies.
Indented rows show who needs each one. We only count dependency files that match this setup. A file for another loader does not fill the gap.
Before you install it
Add Synergy without breaking your instance.
Built for Synergy 0.8.6-hotfix-2. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use 0.8.6-hotfix-2. 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 0.8.6-hotfix-2. It opens that exact file at the source.
About this project
What does Synergy add?
Project description from CurseForge.
Pick your setup
Synergy by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
2 available setups Minecraft version
1.21.1
1
loader build Minecraft version
1.21
1
loader build Check the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
Synergy versions and loaders
22 of 22 releases match synergy-0.8.6-hotfix-2.jar
6 May 2026
Client Source doesn’t say Server Source doesn’t say Dependencies No extras listed Listed on Release listing
Check the 1.21.1 · NeoForge setup → synergy-0.8.6-hotfix-1.jar
29 Apr 2026
Client Source doesn’t say Server Source doesn’t say Dependencies No extras listed Listed on Release listing
Check the 1.21.1 · NeoForge setup → synergy-0.8.4-hotfix1.jar
10 Apr 2026
Client Source doesn’t say Server Source doesn’t say Dependencies No extras listed Listed on Release listing
Check the 1.21.1 · NeoForge setup → synergy-0.8.4-21.1.jar
7 Apr 2026
Client Source doesn’t say Server Source doesn’t say Dependencies No extras listed Listed on Release listing
Check the 1.21.1 · NeoForge setup → synergy-0.8.3-hotfix1-21.1.jar
1 Apr 2026
Client Source doesn’t say Server Source doesn’t say Dependencies No extras listed Listed on Release listing
Check the 1.21.1 · NeoForge setup → synergy-0.8.3-21.1.jar
31 Mar 2026
Client Source doesn’t say Server Source doesn’t say Dependencies No extras listed Listed on Release listing
Check the 1.21.1 · NeoForge setup → synergy-0.8-hotfix1.jar
21 Mar 2026
Client Source doesn’t say Server Source doesn’t say Dependencies No extras listed Listed on Release listing
Check the 1.21.1 · NeoForge setup →