# Mod Category

**URL:** <https://discourse.cataclysmdda.org/t/mod-category/8278>\
**Category:** The Garage\
**Created:** [December 12, 2014, 6:45pm UTC](https://discourse.cataclysmdda.org/t/mod-category/8278 "2014-12-12T18:45:34Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![MorCel\_374](https://sea2.discourse-cdn.com/flex016/user_avatar/discourse.cataclysmdda.org/morcel_374/32/1169_2.png) [@MorCel\_374](https://discourse.cataclysmdda.org/u/MorCel_374)\
**Post date:** [December 12, 2014, 6:45pm UTC](https://discourse.cataclysmdda.org/t/mod-category/8278/1 "2014-12-12T18:45:34Z")

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I’ve got a question about mods. Let’s say I want to add a “WELD” quality for the welder, which is already in game, or I want to add new stuff to an already-existing item\_group; shortly, overwriting stuff. Would it work, or would it crash?

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**Author:** ![vache](https://avatars.discourse-cdn.com/v4/letter/v/ea666f/32.png) [@vache](https://discourse.cataclysmdda.org/u/vache)\
**Post date:** [December 12, 2014, 6:50pm UTC](https://discourse.cataclysmdda.org/t/mod-category/8278/2 "2014-12-12T18:50:04Z")

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Adding a weld property wouldn’t work, because the games code wouldn’t know how to handle that property.

Adding new items to an item group would be okay, because everything necessary would exist either in the game at compile time or in the jsons loaded at run time.

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**Author:** ![MorCel\_374](https://sea2.discourse-cdn.com/flex016/user_avatar/discourse.cataclysmdda.org/morcel_374/32/1169_2.png) [@MorCel\_374](https://discourse.cataclysmdda.org/u/MorCel_374)\
**Post date:** [December 12, 2014, 6:52pm UTC](https://discourse.cataclysmdda.org/t/mod-category/8278/3 "2014-12-12T18:52:34Z")

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Actually, “WELD” quality, for crafting and construction; I defined it in qualities.json.

So, I guess I’d simply modify the game itself. Buh.