CurseForge · Minecraft mod
Psi: Tweaks and Additions
This is a Psi add-on. It adds integration with Mekanism.
Quick answer
Which Psi: Tweaks and Additions release should I use?
Psi: Tweaks and Additions psitweaks-1.21.1-0.10.10-hotfix.jar targets 1.21.1 with NeoForge. The project page does not say whether this file belongs on the client, dedicated server, or both. 2 required mods need checking.
Where it goes
Is Psi: Tweaks and Additions required on the client, server, or both?
The project page does not say whether this file belongs on the client, dedicated server, or both.
The source does not explicitly classify this release as client-only or server-only.
What else does Psi: Tweaks and Additions psitweaks-1.21.1-0.10.10-hotfix.jar need?
psitweaks-1.21.1-0.10.10-hotfix.jar. Change the file and its required mods may change too.
Install Curios API, Psi, Patchouli, project vvuO3ImH and 1 more first. 2 required mods still need checking for this exact setup. 27 come through another mod in the chain.
27 extra mods were pulled in by other dependencies. 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 Psi: Tweaks and Additions without breaking your instance.
Built for Psi: Tweaks and Additions psitweaks-1.21.1-0.10.10-hotfix.jar. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use psitweaks-1.21.1-0.10.10-hotfix.jar. It targets 1.21.1 with NeoForge; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
Install Curios API, Psi, Patchouli, project vvuO3ImH and 1 more first. 2 required mods still need checking for this exact setup. 27 come through another mod in the chain.
- 03
Put it on the correct side
The project page does not say whether this file belongs on the client, dedicated server, or both.
- 04
Pick the file you checked
Use the “Get this file” button beside psitweaks-1.21.1-0.10.10-hotfix.jar. It opens that exact file at the source.
About this project
What does Psi: Tweaks and Additions add?
Psi: Tweaks And Additions
PsiTweaks is an addon mod that expands the magical programming mod Psi, providing a deeper experience and extending its progression well into the late game.
It adds numerous spell pieces, new programming types, higher-tier CADs and spell bullets, casting-support equipment, a research system, and various quality-of-life improvements. When Mekanism is installed, players can also access industrial production methods for Psi materials, dedicated machines, and MekaSuit modules.
Documentation for these features is included in the in-game Encyclopaedia Psionica through Patchouli.
Main Features
Expanded Spell Programming
- Numerous spell pieces for combat, flight, string processing, matrix operations, flow control, and more
- New types such as Item, Block, String, and Matrix
- Storage of numbers, strings, matrices, and other values in CAD memory
- A research system for unlocking certain advanced spell pieces
- Quality-of-life improvements for the Spell Programmer
In addition to straightforward offensive spells, these features allow you to create complex spells that work with item and block data, as well as programs designed for automation.
CADs, Spell Bullets, and Equipment
- Several new families of CAD materials and high-performance CAD assemblies
- Higher-tier versions of the various spell bullet types
- Useful magic items such as Inline Casters and automatic casting devices
- Spell Magazines that allow spell bullets to be stored and swapped
- New and powerful equipment designed for Magicians
Higher-tier equipment makes it practical to use large-scale, high-cost spells that would be difficult to handle with standard Psi equipment.
Mekanism Integration
PsiTweaks strongly recommends installing Mekanism and adds various features that connect Psi progression with industrial machinery.
- Production of Psi materials using the Metallurgic Infuser
- The Program Researcher, Material Mutator, and Sculk Eroder
- The Psionic Generator, which generates energy by consuming a linked player's Psi
- MekaSuit modules that increase Psi regeneration, maximum Psi capacity, and spell damage
When Mekanism is not installed, Mekanism-specific machines and modules are not added. Alternative recipes are provided for certain materials and research programs.
Required and Recommended Mods
Required
- Psi
- Curios API
- Patchouli
Strongly Recommended
- Mekanism
- Mekanism Generators
- JEI
Optional Integrations
- Create Aeronautics / Sable (1.21.1)
- Tinkers' Construct (1.20.1)
Please note that some features may differ depending on the Minecraft version and the other mods installed.
Special thanks to Vazkii, the creator of Psi, and bradyaidanc, the creator of Mekanism.
Some elements of this mod were inspired by or make use of ideas from PlusTiC Reforged by queengooborg, Random PSIdeas by kamefrede123, and Psionic Peripherals by Dudblockman. I would also like to extend my sincere thanks to their creators.
Project description from CurseForge.
Pick your setup
Psi: Tweaks and Additions by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
1.21.1
1 loader build1.20.1
1 loader buildCheck the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
Psi: Tweaks and Additions versions and loaders
psitweaks-1.21.1-0.10.10-hotfix.jar
20 Oct 2026
psitweaks-1.21.1-0.10.10.jar
17 Oct 2026
psitweaks-1.20.1-0.10.10.jar
17 Oct 2026
psitweaks-1.20.1-0.10.9.jar
17 Sept 2026
psitweaks-1.21.1-0.10.9.jar
17 Sept 2026
psitweaks-1.21.1-0.10.8-hotfix.jar
8 Sept 2026
psitweaks-1.21.1-0.10.8.jar
7 Sept 2026
psitweaks-1.20.1-0.10.8.jar
7 Sept 2026
psitweaks-1.20.1-0.10.7-hotfix.jar
30 Aug 2026
psitweaks-1.21.1-0.10.7.jar
15 Aug 2026
psitweaks-1.20.1-0.10.7.jar
15 Aug 2026
psitweaks-1.20.1-0.10.6.jar
11 Aug 2026
Looking for an older file? The official CurseForge project page is in Resources.