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YTechMinecraft mod for 1.21.3

YTech - improves early game by increasing time to reach "iron age" using prehistoric technology.

client and servernewest supported 1.21.3TechnologyMobsEquipmentGame Mechanics
Latest version
1.21.1-0.10.13
Minecraft
1.20.1 to 1.21.3
Java
Java 21+
Loaders
Forge, NeoForge
Licence
GPL-3.0-or-later
Downloads
7.7k
Updated
6 mo ago
Available on
Modrinth
Space NodeOur hosting

Host YTech servers

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

  • 1.21.3
  • Forge
  • NeoForge
  • 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 YTech declares support for, newest first, with the Java runtime that version needs.

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.3Forge, NeoForge21+declared23 Oct 2024
1.21.1Forge, NeoForge21+declared8 Aug 2024
1.21NeoForge, Forge21+declared13 Jun 2024
1.20.6Forge, NeoForge21+declared29 Apr 2024
1.20.5NeoForge, Forge21+declared23 Apr 2024
1.20.4NeoForge, Forge17+declared7 Dec 2023
1.20.3NeoForge, Forge17+declared4 Dec 2023
1.20.2Forge, NeoForge17+declared20 Sept 2023
1.20.1NeoForge, Forge17+declared12 Jun 2023

Download

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

All 60 releases
1.21.1-0.10.13release15 Apr 2026

ytech-1.21.1-0.10.13.jar · 2.2 MB · for 1.21.1

Download latest
cf75dc1584c5…
Older versions24
  • 1.20.1-0.10.1315 Apr 20261.20.12.3 MB276 downloads767db97728b5…Get
  • 1.21.1-0.10.124 Apr 20261.21.12.2 MB45 downloadsfb011522e993…Get
  • 1.20.1-0.10.124 Apr 20261.20.12.3 MB59 downloads4078370a8d51…Get
  • 1.21.1-0.10.1124 Feb 20261.21.12.2 MB69 downloads5b3412ce5440…Get
  • 1.20.1-0.10.1124 Feb 20261.20.12.3 MB139 downloadsfe90748df61a…Get
  • 1.21.1-0.10.105 Jan 20261.21.12.2 MB86 downloads6659d64a151c…Get
  • 1.21.1-0.10.912 Oct 20251.21.12.2 MB144 downloadsc198c9170a42…Get
  • 1.20.1-0.10.912 Oct 20251.20.12.3 MB410 downloads06e08ec410de…Get
  • 1.21.1-0.10.811 Oct 20251.21.12.2 MB41 downloads47258276cc28…Get
  • 1.20.1-0.10.811 Oct 20251.20.12.3 MB45 downloadsf528fc2d0945…Get
  • 1.21.3-0.10.74 Oct 20251.21.32.1 MB73 downloadsa8d3308e3ac0…Get
  • 1.21.1-0.10.74 Oct 20251.21.12.2 MB49 downloads38b994c842d3…Get
  • 1.20.1-0.10.74 Oct 20251.20.12.3 MB53 downloads1991001f1d61…Get
  • 1.21.3-0.10.65 Jun 20251.21.32.1 MB82 downloadseaff26b5ca2e…Get
  • 1.21.1-0.10.65 Jun 20251.21.12.2 MB177 downloads8bd86d00640b…Get
  • 1.20.1-0.10.65 Jun 20251.20.12.3 MB407 downloads17aadff4dbc2…Get
  • 1.21.1-0.10.512 May 20251.21.12.2 MB97 downloads59c55ea8d031…Get
  • 1.21.1-0.10.427 Apr 20251.21.12.2 MB77 downloadsc51d5e012496…Get
  • 1.21.3-0.10.39 Feb 20251.21.32.1 MB47 downloads49dc62e78342…Get
  • 1.21.1-0.10.39 Feb 20251.21.12.2 MB128 downloadsd0a4f926360a…Get
  • 1.20.1-0.10.39 Feb 20251.20.12.3 MB549 downloadsd76d18ef9146…Get
  • 1.21.3-0.10.224 Jan 20251.21.32.1 MB54 downloads807b05fe4172…Get
  • 1.21.1-0.10.224 Jan 20251.21.12.2 MB67 downloadse03902fcd9e6…Get
  • 1.20.1-0.10.224 Jan 20251.20.12.3 MB82 downloads5f5d97b674f8…Get

Frequently asked

Does YTech work on Minecraft 1.21.3?

Yes. 1.21.3 is the newest Minecraft version YTech 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 YTech support?

Everything the author has declared, from 1.20.1 up to 1.21.3. The full list is in the table above, with the Java runtime each version needs next to it.

Do I need to install YTech 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 YTech 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 YTech?

On the newest Minecraft version it supports, Java 21 or newer. The requirement comes from the Minecraft version you run rather than from the mod itself, so on an older supported Minecraft the answer is that version's Java, not this one.

What licence is YTech under?

GPL-3.0-or-later, 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 YTech?

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 YTech 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. The download link goes to the source recorded for that release; verify the publisher, filename and checksum before running it.

Works on the same versions

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

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Details from Modrinth, where the author last updated it on 15 Apr 2026. We do not host files and we do not republish descriptions; every download link points at the author’s own release.

Is this information wrong or missing something? .