Menu

mod

Player2 AI NPCMinecraft mod for 1.21.1

This 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.

client and servernewest supported release 1.21.1AdventureMobsSocial
Latest version
1.21.1-1.4.0-NeoForge
Minecraft
1.20.1 to 1.21.1
Java
Java 21+
Loaders
NeoForge, Forge, Fabric
Licence
MIT
Downloads
77.5k
Updated
4 mo ago
Available on
Modrinth
Space NodeOur hosting

Host Player2 AI NPC servers

One click and Player2 AI NPC is installed with the right loader, on hardware built for it.

  • 1.21.1
  • NeoForge
  • Forge
  • Fabric
  • 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 Player2 AI NPC declares support for, newest first, with the Java runtime that version needs.

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.1NeoForge, Forge, Fabric21+declared8 Aug 2024
1.21Fabric, NeoForge, Forge21+declared13 Jun 2024
1.20.6Forge, NeoForge, Fabric21+declared29 Apr 2024
1.20.5Fabric, Forge, NeoForge21+declared23 Apr 2024
1.20.4Fabric, NeoForge, Forge17+declared7 Dec 2023
1.20.3Fabric, NeoForge, Forge17+declared4 Dec 2023
1.20.2NeoForge, Forge, Fabric17+declared20 Sept 2023
1.20.1Fabric, Forge, NeoForge17+declared12 Jun 2023

Download

From Player2 AI NPC’s own host. Nothing is re-hosted here.

For Minecraft 1.21.1

Choose the loader you use before downloading.

  • NeoForge

    1.21.1-1.4.0-NeoForge · 19 Jul 2026 · player2npc-neoforge-1.21.1-1.4.0.jar

    Get NeoForge

  • Fabric

    1.21.1-1.4.0-Fabric · 19 Jul 2026 · player2npc-fabric-1.21.1-1.4.0.jar

    Get Fabric

  • Fabric, NeoForge

    1.21.1-1.1.8 · 6 May 2026

    Multiple loaders are listed; verify the file before downloading.

    Choose file on publisher ↗

  • Fabric, Forge, NeoForge

    1.1.6 · 19 Nov 2025

    Multiple loaders are listed; verify the file before downloading.

    Choose file on publisher ↗

Most recently published release

1.21.1-1.4.0-NeoForgerelease19 Jul 2026

player2npc-neoforge-1.21.1-1.4.0.jar · 1.1 MB · for 1.21.1 · NeoForge

Download this release
91e9587bdaf4…
Older versions20
  • 1.21.1-1.4.0-Fabric19 Jul 20261.21.11.1 MBa93bbe295d9c…Get
  • 1.20.1-1.4.0-Forge19 Jul 20261.20.11.1 MBb7aa3e482f52…Get
  • 1.20.1-1.4.0-Fabric19 Jul 20261.20.11.1 MBc8d9c29eeee9…Get
  • 1.21.1-1.3.0-NeoForge17 Jun 20261.21.10.1 MB8b4b93fe2192…Get
  • 1.21.1-1.3.0-Fabric17 Jun 20261.21.10.1 MBcfa743fc6727…Get
  • 1.20.1-1.3.0-Forge17 Jun 20261.20.10.1 MB01b0261fe0e1…Get
  • 1.20.1-1.3.0-Fabric17 Jun 20261.20.10.1 MB39e5cd7db582…Get
  • 1.21.1-1.2.0-NeoForge14 May 20261.21.10.1 MB12284676d44b…Get
  • 1.21.1-1.2.0-Fabric14 May 20261.21.10.1 MB851e0566cba1…Get
  • 1.20.1-1.2.0-Forge14 May 20261.20.10.1 MBd318c711f7bd…Get
  • 1.20.1-1.2.0-Fabric14 May 20261.20.10.1 MBaebf04673fd6…Get
  • 1.21.1-1.1.86 May 20261.21.163 KBbd77b6e31828…Choose file on publisher ↗
  • 1.20.1-1.1.86 May 20261.20.159 KBc4da1c2ad428…Choose file on publisher ↗
  • 1.21.1-1.0.712 Jan 20261.21.1, 1.2153 KBcdae22e99267…Choose file on publisher ↗
  • 1.20.1-1.0.712 Jan 20261.20.6, 1.20.5, 1.20.4, 1.20.3, 1.20.2 +1 more52 KB0d7deb2f1de1…Choose file on publisher ↗
  • 1.1.619 Nov 20251.21.1, 1.20.152 KB0fae84664e4e…Choose file on publisher ↗
  • 1.1.36 Nov 20251.21.1, 1.20.154 KB3d3391f22060…Choose file on publisher ↗
  • 1.1.227 Oct 20251.21.1, 1.20.151 KB728522636e4c…Get
  • 1.21.1-1.1.020 Oct 20251.21.151 KBd51927f87f74…Get
  • 1.1.09 Oct 20251.20.149 KB1bdcb868e94a…Get

Frequently asked

Does Player2 AI NPC work on Minecraft 1.21.1?

Yes. 1.21.1 is the newest Minecraft version Player2 AI NPC 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 Player2 AI NPC 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 Player2 AI NPC 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 Player2 AI NPC support?

NeoForge, Forge, Fabric. 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 Player2 AI NPC?

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 Player2 AI NPC 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 Player2 AI NPC?

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 Player2 AI NPC 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+)

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? .