> For the complete documentation index, see [llms.txt](https://wiki.redmodding.org/cyberpunk-2077-modding/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://wiki.redmodding.org/cyberpunk-2077-modding/for-mod-creators-theory/core-mods-explained/tweakxl.md).

# TweakXL

## What is TweakXL?

For a detailed guide with many explanations of properties, check the second half of[New Iconic Weapon: Step by Step](/cyberpunk-2077-modding/modding-guides/items-equipment/adding-new-items/weapons/new-iconic-weapon-step-by-step.md)

TweakXL ([nexus](https://www.nexusmods.com/cyberpunk2077/mods/4197) | [github](https://github.com/psiberx/cp2077-tweak-xl)) is a mod by psiberx. It lets you alter Cyberpunk's [Tweak Database](/cyberpunk-2077-modding/for-mod-creators-theory/tweaks/tweaks.md), changing properties of NPCs and items or even adding new entries.

## How do I use it?

By placing `.yaml` or `.tweak` files in Cyberpunk `2077/r6/tweaks`, or .xl files in `Cyberpunk 2077/archive/pc/mod`.

{% hint style="warning" %}
No matter the file extension, the file `contents` must be `.yaml` or `.json`
{% endhint %}

## Where are the guides?

### Theory

* Explanation of the database: [TweakDB: Game database](/cyberpunk-2077-modding/for-mod-creators-theory/tweaks/tweaks.md)
* Additional information: TweakXL [wiki on github.](https://github.com/psiberx/cp2077-tweak-xl/wiki/TweakDB)

### Praxis

{% content-ref url="/pages/9dBoS6d1ocs21ffoHtdy" %}
[TweakXL: Changing game records](/cyberpunk-2077-modding/for-mod-creators-theory/core-mods-explained/tweakxl/tweakxl-changing-game-records.md)
{% endcontent-ref %}


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