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Project AlphaMinecraft mod for 1.21.4

A Sci-Fi Mod about travelling back to Alpha Minecraft

newest supported release 1.21.4TechnologyMagicAdventure RpgWorld Mobs
Latest version
project_alpha-1.6-neoforge-1.21.1.jar
Minecraft
1.16.5 to 1.21.4
Java
Java 21+
Loaders
Forge, NeoForge
Licence
not stated
Downloads
131.5k
Updated
3 mo ago
Available on
CurseForge

Screenshots

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

Minecraft versions

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

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.4Forge, NeoForge21+declared3 Dec 2024
1.21.1NeoForge, Forge21+declared8 Aug 2024
1.20.1Forge, NeoForge17+declared12 Jun 2023
1.19.4NeoForge, Forge17+declared14 Mar 2023
1.16.5NeoForge, Forge8+declared14 Jan 2021

Download

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

Browse 40 indexed releases

For Minecraft 1.21.4

Choose the loader you use before downloading.

  • NeoForge

    project_alpha-1.2.2-neoforge-1.21.4.jar · 25 Aug 2025 · project_alpha-1.2.2-neoforge-1.21.4.jar

    Get NeoForge

Most recently published release

project_alpha-1.6-neoforge-1.21.1.jarrelease28 Jul 2026

project_alpha-1.6-neoforge-1.21.1.jar · 7.9 MB · for 1.21.1 · NeoForge

Download this release
3d2278ac4503…
Older versions24
  • project_alpha-1.6-forge-1.20.1.jar28 Jul 20261.20.17.9 MBa34039465880…Get
  • project_alpha-1.5.1-neoforge-1.21.1.jar12 Jul 20261.21.18.0 MB167 downloadsd337a7467f73…Get
  • project_alpha-1.5.1-forge-1.20.1.jar12 Jul 20261.20.18.1 MB61 downloads00c7851ec28d…Get
  • project_alpha-1.5-forge-1.20.1.jar4 Jul 20261.20.18.1 MB62 downloadsbc90cdc26c44…Get
  • project_alpha-1.5-neoforge-1.21.1.jar4 Jul 20261.21.18.0 MBd25d609f8a18…Get
  • project_alpha-1.4-neoforge-1.21.1.jar10 May 20261.21.14.5 MB26 downloadsf1261aa71e75…Get
  • project_alpha-1.4-forge-1.20.1.jar9 May 20261.20.14.6 MB39 downloadsda57e59280bd…Get
  • project_alpha-1.3-neoforge-1.21.1.jar15 Feb 20261.21.14.5 MB21.3k downloads30d3bb3f5c01…Get
  • project_alpha-1.3-forge-1.20.1.jar6 Feb 20261.20.14.6 MB63 downloads78462ee575cc…Get
  • project_alpha-1.2.4-forge-1.20.1.jar12 Sept 20251.20.14.0 MBcc82959a9a56…Get
  • project_alpha-1.2.3-forge-1.20.1.jar1 Sept 20251.20.11.2 MBc5aaede9b5bf…Get
  • project_alpha-1.2.2-neoforge-1.21.4.jar25 Aug 20251.21.41.2 MBba5ab3f2f10b…Get
  • project_alpha-1.2.2-forge-1.20.1.jar25 Aug 20251.20.11.2 MB208e806ce810…Get
  • project_alpha-1.2.1-neoforge-1.21.4.jar18 Aug 20251.21.41.2 MB7f796c14f7a6…Get
  • project_alpha-1.2.1-forge-1.20.1.jar18 Aug 20251.20.11.2 MB2fc55ae2e476…Get
  • project_alpha-1.2-forge-1.20.1.jar17 Aug 20251.20.11.2 MB099932c062f6…Get
  • project_alpha-v1.1-neoforge-1.21.4.jar25 Jun 20251.21.40.9 MB12 downloadsbb41337e1b33…Get
  • project_alpha-v1.1-forge-1.20.1.jar24 Jun 20251.20.10.8 MB64 downloads1983bf7a1e76…Get
  • project_alpha-v1.0-neoforge-1.21.4.jar18 Jun 20251.21.40.9 MB21 downloads66a85b9e53b3…Get
  • project_alpha-v1.0-forge-1.20.1.jar18 Jun 20251.20.10.8 MB666b54c2bfa4…Get
  • project_alpha-0.21-forge-1.20.1.jar24 Apr 20251.20.10.6 MB1.1k downloads4f970d1ca52d…Get
  • project_alpha-0.21-neoforge-1.21.1.jar24 Apr 20251.21.10.6 MB38 downloads199372e8a9a6…Get
  • project_alpha-0.20.1-forge-1.20.1.jar22 Jul 20241.20.10.9 MB1.5k downloads5b9db2b8681d…Get
  • project_alpha-0.20.1-forge-1.16.5.jar8 Jul 20241.16.51.2 MB163 downloads67dffd84d646…Get

Frequently asked

Does Project Alpha work on Minecraft 1.21.4?

Yes. 1.21.4 is the newest Minecraft version Project Alpha 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 Project Alpha support?

Everything the author has declared, from 1.16.5 up to 1.21.4. The full list is in the table above, with the Java runtime each version needs next to it.

Which platform or loader does Project Alpha support?

Forge, NeoForge. 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 Project Alpha?

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.

How do I install Project Alpha?

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 Project Alpha safely?

Start with the author's page on CurseForge, 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!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+)Collective🎓 Collective is a shared library with common code for all of Serilum's mods.

Details from CurseForge, where the author last updated it on 28 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? .