CurseForge · Minecraft mod
YTech
YTech improves early game by increasing time to reach "iron age".
Quick answer
Which YTech release should I use?
ytech-1.21.1-0.10.13.jar targets 1.21.1 with NeoForge. The project page does not say whether it belongs on the client. The project page does not say whether it belongs on the dedicated server. No extra mods listed for this file.
Where it goes
Is YTech required on the client, server, or both?
The project page does not say whether it belongs on the client. The project page does not say whether it belongs on the dedicated server.
The source does not explicitly classify this release as client-only or server-only.
What else does ytech-1.21.1-0.10.13.jar need?
ytech-1.21.1-0.10.13.jar. Change the file and its required mods may change too.
This file does not list any required mods. Do not add a library just because a different file uses it.
1 extra mod was pulled in by another dependency. 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 YTech without breaking your instance.
Built for ytech-1.21.1-0.10.13.jar. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use ytech-1.21.1-0.10.13.jar. 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 it belongs on the client. The project page does not say whether it belongs on the dedicated server.
- 04
Pick the file you checked
Use the “Get this file” button beside ytech-1.21.1-0.10.13.jar. It opens that exact file at the source.
About this project
What does YTech add?
YTech
brings you to Stone Age, increasing difficulty on early game by forcing you to use primitive technology for progression.
Also, vanilla mobs like cows, pigs, sheep and chickens are replaced by their wild ancestors.
Vanilla recipes for early game items are modified, forcing tools on some blocks and adding new tools, items and blocks to help you with progression.
Currently mod covers
- Stone age
- Bronze age
- Beginning of iron age (crafting iron ingot is final step right now)
Compatibility
These dependencies are optional, but highly recommended:
- The One Probe - Provides more information about in-world blocks and entities
- Just Enough Items - You can see all changed recipes
- Curios API - Needed for jewelry effects, otherwise items are useless
- KubeJS - Easy way to add/modify/remove YTech recipes (API described on wiki)
- EMI - You can browse all recipes
- Jade - Provides more information about in-world blocks and entities
All bugs report on GitHub.
Ideas for expanding implemented ages or for next ages can be shared on discord.
For more information check wiki
Hints
- You can't mine wood and dirt without correct tool
- Your first goal is to find flint and hit stone with it
- Grass fibers can be obtained by breaking grass with sharp flint
- Look for deer, you need it for your first pickaxe
- Only deer with antlers drops correct item
- Primitive Smelter and Primitive Alloy Smelter needs chimneys for increasing temperature
- Each type of chimney can be up to 4 blocks high, otherwise it collapse
- Using reinforced chimney you can increase height up to 8 blocks, with 4 of each chimney
- Lead and Cassiterite can be gathered using Strainer
- It's recommended to use JEI
- You have to breed wild animals to get their domesticated versions
- Aurochs -> Cow
- Mouflon -> Sheep
- Fowl -> Chicken
- Wild Boar -> Pig
Project description from CurseForge.
Pick your setup
YTech by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
1.21.3
1 loader build1.21.1
1 loader build1.20.4
1 loader build1.20.1
2 loader buildsCheck the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
YTech versions and loaders
ytech-1.21.1-0.10.13.jar
15 Apr 2026
ytech-1.20.1-0.10.13-all.jar
15 Apr 2026
ytech-1.20.1-0.10.12-all.jar
4 Apr 2026
ytech-1.21.1-0.10.12.jar
4 Apr 2026
ytech-1.21.1-0.10.11.jar
24 Feb 2026
ytech-1.20.1-0.10.11-all.jar
24 Feb 2026
ytech-1.21.1-0.10.10.jar
5 Jan 2026
ytech-1.21.1-0.10.9.jar
12 Oct 2025
ytech-1.20.1-0.10.9-all.jar
12 Oct 2025
ytech-1.21.1-0.10.8.jar
11 Oct 2025
ytech-1.20.1-0.10.8-all.jar
11 Oct 2025
ytech-1.21.3-0.10.7.jar
4 Oct 2025
Looking for an older file? The official CurseForge project page is in Resources.