Menu

mod

PlayerEngineMinecraft mod for 1.21.1

PlayerEngine is a server-side framework designed to fundamentally change how AI NPCs exist in Minecraft.

client and servernewest supported release 1.21.1MobsLibrarySocial
Latest version
1.21.1-1.4.0-NeoForge
Minecraft
1.20.1 to 1.21.1
Java
Java 21+
Loaders
NeoForge, Fabric, Forge
Licence
MIT
Downloads
69.0k
Updated
4 mo ago
Available on
Modrinth
Space NodeOur hosting

Host PlayerEngine servers

One click and PlayerEngine is installed with the right loader, on hardware built for it.

  • 1.21.1
  • NeoForge
  • Fabric
  • Forge
  • One click mod install
  • Loader matched for you
  • Ryzen CPUs
  • NVMe SSD
Deploy a serverFrom €0.90 per GB

Screenshots

Click a screenshot to open it. Screenshots are served from the author’s own host and belong to them.

Minecraft versions

Every version PlayerEngine declares support for, newest first, with the Java runtime that version needs.

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.1NeoForge, Fabric, Forge21+declared8 Aug 2024
1.21Forge, Fabric, NeoForge21+declared13 Jun 2024
1.20.1Fabric, NeoForge, Forge17+declared12 Jun 2023

Download

From PlayerEngine’s own host. Nothing is re-hosted here.

Browse 28 indexed releases

For Minecraft 1.21.1

Choose the loader you use before downloading.

  • NeoForge

    1.21.1-1.4.0-NeoForge · 19 Jul 2026 · playerengine-neoforge-1.21.1-1.4.0.jar

    Get NeoForge

  • Fabric

    1.21.1-1.4.0-Fabric · 19 Jul 2026 · playerengine-fabric-1.21.1-1.4.0.jar

    Get Fabric

Most recently published release

1.21.1-1.4.0-NeoForgerelease19 Jul 2026

playerengine-neoforge-1.21.1-1.4.0.jar · 4.2 MB · for 1.21.1 · NeoForge

Download this release
29fcb685de15…
Older versions24
  • 1.21.1-1.4.0-Fabric19 Jul 20261.21.14.2 MB1.6k downloadsaf6c76cc2f2f…Get
  • 1.20.1-1.4.0-Forge19 Jul 20261.20.14.3 MB2.9k downloadsb023be8d9b45…Get
  • 1.20.1-1.4.0-Fabric18 Jul 20261.20.14.3 MB780 downloads236f08012eb6…Get
  • 1.21.1-1.3.0-NeoForge17 Jun 20261.21.12.7 MB3.2k downloadsc11fdf65fd1b…Get
  • 1.21.1-1.3.0-Fabric17 Jun 20261.21.12.7 MB3.2k downloads9ddf31f38bb2…Get
  • 1.20.1-1.3.0-Forge17 Jun 20261.20.12.8 MB4.9k downloads06917369d618…Get
  • 1.20.1-1.3.0-Fabric17 Jun 20261.20.12.7 MB1.2k downloads998f297e87f5…Get
  • 1.21.1-1.2.0-NeoForge14 May 20261.21.12.0 MB2.3k downloadsa5e4b0623253…Get
  • 1.21.1-1.2.0-Fabric14 May 20261.21.12.0 MB2.6k downloads71c4506d99c3…Get
  • 1.20.1-1.2.0-Forge14 May 20261.20.12.0 MB4.0k downloads12d6bae7dfd1…Get
  • 1.20.1-1.2.0-Fabric14 May 20261.20.12.0 MB1.0k downloads1c1548921909…Get
  • 1.21.1-1.1.126 May 20261.21.11.9 MB575 downloadscb39791ddec9…Get
  • 1.20.1-1.1.126 May 20261.20.11.9 MB284 downloads2cf4b732f53e…Get
  • 1.21.1-1.0.712 Jan 20261.21.11.9 MB7.9k downloadsa544ccf4d025…Get
  • 1.20.1-1.0.712 Jan 20261.20.11.9 MB10.4k downloads3aa7bf555522…Get
  • 1.1.1023 Dec 20251.20.11.9 MB312 downloads0479a0545f57…Get
  • 1.1.917 Dec 20251.21.11.9 MB96 downloadsd1688791a416…Get
  • 1.1.811 Dec 20251.21.11.7 MB110 downloads7b093eaa2085…Get
  • 1.1.71 Dec 20251.20.11.7 MB146 downloads053241bfc022…Get
  • 1.1.620 Nov 20251.20.11.7 MB215 downloads1738bfe7b849…Get
  • 1.1.47 Nov 20251.21.11.7 MB211 downloadsff74c353827a…Get
  • 1.1.36 Nov 20251.21.11.7 MB235 downloads07d0950c29f5…Get
  • 1.1.227 Oct 20251.20.11.7 MB195 downloadsa7a82b978d3f…Get
  • 1.21.1-1.0.019 Oct 20251.21.11.7 MB460 downloads5992c3486991…Get

Frequently asked

Does PlayerEngine work on Minecraft 1.21.1?

Yes. 1.21.1 is the newest Minecraft version PlayerEngine declares support for, and the claim comes from the author's own release metadata rather than from a compatibility list somebody maintains by hand.

Which Minecraft versions does PlayerEngine support?

Everything the author has declared, from 1.20.1 up to 1.21.1. The full list is in the table above, with the Java runtime each version needs next to it.

Do I need to install PlayerEngine on the client or the server?

Both. Every player needs it installed and so does the server, so anyone joining without it will be refused.

Which platform or loader does PlayerEngine support?

NeoForge, Fabric, Forge. A build for one platform or loader will not necessarily load on another, so this is the first thing to check before the Minecraft version.

Which Java version do I need for PlayerEngine?

Among the supported Minecraft releases above, the highest recorded requirement is Java 21 or newer. Use the requirement for the exact Minecraft version you run; previews and snapshots may differ.

What licence is PlayerEngine under?

MIT, as stated by the author on the platform we synced it from. Check the project's own page before redistributing or bundling it.

How do I install PlayerEngine?

Install the matching loader first, then put the downloaded file in your mods folder and start the game. The loader, the mod and Minecraft all have to be on the same version, which is the usual reason a mod does not appear in game.

Where do I download PlayerEngine safely?

Start with the author's page on Modrinth, which is where the data here is synced from. MCReference does not host or repackage files. When available, recorded download links go to the source for that release; verify the publisher, filename and any available checksum before running it.

Works on the same versions

Ordered by how much of the recent Minecraft version coverage overlaps, not by popularity.

GeckoLibA 3D animation library for entities, blocks, items, armor, and more!BookshelfAn open source library for other mods!Cloth Config API (Fabric/Forge/NeoForge)Config Screen API for MinecraftJourneyMapReal-time map used for mapping in-game or your browser as you explore.Architectury APIAn intermediary api aimed to ease developing multiplatform mods.Jade 🔍Shows information about what you are looking at. (Hwyla/WAILA fork for Minecraft 1.16+)

Used by

1 project lists PlayerEngine as a required dependency.

Player2 AI NPCThis is not just another companion mod; it is a live showcase of the PlayerEngine framework, built to fundamentally change our perception of AI NPCs in Minecraft.

Details from Modrinth, where the author last updated it on 19 Jul 2026. We do not host files or republish descriptions. Available download links point to the author’s own release.

Is this information wrong or missing something? .