I believe the recipes a player can craft is based on character's prototype's crafting_categories . Usually, that's data.raw.character.character.crafting_categories, I think. Adding your category to that table should do it?


Not sure where a player without a character gets their recipe list from ...

I appreciate the tip about the prototype explorer! This will be very helpful.

Using that, I can see the "item-group" prototype "intermediate-products" has both hidden and hidden_in_factoriopedia as true.

Looking at other item groups (such as Logistics), these values are false.


But also the ...

My mod introduces a new entity of type "assembling-machine". This entity's crafting_categories is set to {"custom-test"}, a crafting category my mod defines. The modded assembler is otherwise a clone of assembling-machine-1.

My modded assembler works correctly. The only recipes that appear in its ...

simply set the hidden , as well as hidden_in_factoriopedia properties to true instead of deleting the prototypes
https://lua-api.factorio.com/latest/prototypes/PrototypeBase.html#hidden

Thank you for reply.

I must be doing something wrong. I tried:

data.raw["item-group"]["intermediate ...

Over the past hour or so, forum pages have been loading more and more slowly for me. They occasionally fail with a 502 cloudflare error, indicating factorio.com (rather than cloudflare) is the issue. This occurs whether logged in or not.

Mod portal pages seem to load quickly and consistently. Only ...

Or: How do I wildcard repetitive data.raw rules?

I am working on a mod in which all Intermediate items and crafting recipes will have no use, because every recipe that would use them will use items added by my mod instead, which I am splitting across their own crafting tabs. I have already found a ...

Panzerknacker wrote: Fri Apr 17, 2026 5:29 am Nuking the brilliant fluid system in the last minute before 2.0 release was imo the worst decision made in the game's history.

What do you mean by this?

Thanks to the new logic in combinators, it is possible for one combinator to have multiple conditions. In theory, this should allow one combinator to perform a function previously performed by many.

I am looking for a way to have a single combinator set filters on an inserter, where the filters are ...

Doing this as elegantly as you want (having the lab read promethium science as any science pack) would require more scripting knowledge than I (and presumably you) lack.

However, a less elegant solution would be to have crafting promethium science also unlock recipes to craft promethium science ...

As discussed in this thread .

Entities belonging to the "assembling-machine" prototype can show an unspecific error on recipes: "cannot be crafted in this machine".

I saw this error while developing a mod adding recipes with more input or output fluids than the machine in question (in this case ...

You just need to extend the Foundry to include the additional 2 Input/Output fluid boxes; which it sounds like you have already done. :-) The drawback is that you are not be able to do 4 Fluid In + 2 Fluid Out without a custom pipe-graphics patch, because Foundries only have 4 "points" to connect ...

I swear we used to have an option for left-hand rail. I've gone looking for it but cannot find it.

Am I mixing this up with another game? Is the option gone now?


The game you are thinking of is OpenTTD, which does have a setting to swap the side the signals are on, making LHD setups mirror ...

I am developing a mod that introduces new metallurgical recipes, crafted in a foundry. Some of these recipes have three input or output fluids. One has four input fluids (and an item output).

It seems the foundry is set up so that cannot happen. The recipes appear in the foundry recipe selection ...

I appreciate the attempt to help, but I think this is beyond my ken.

I struggled understand how this system works, and what each condition does in practice. I thought the best thing to do would be to re-create the given example. This is convenient for me in any case, as it seems to do what I have ...

So that's why the combinator interface changed! We can put multiple conditions in one combinator now!

Thanks for the link. I'm going to spend some time reading that tutorial and see if I can make use of it.

I've tried this as many different ways as I can think of.

Attempt one:

I have a combinator reading from the space station hub.
INPUT: Copper Wire < 3
OUTPUT Copper Wire: 1

The output is hooked to an assembler with "set recipe" enabled.

I have another combinator reading from the space station hub ...

Thanks, that explains it! They did seem to come out of no-where. I hadn't noticed they were coming from the Strafers. If they're projectiles, it makes sense I cannot target them. We cannot target other player's rockets in PvP either.

Honestly, knowing they're not an enemy type of their own is a ...

I swear we used to have an option for left-hand rail. I've gone looking for it but cannot find it.

Am I mixing this up with another game? Is the option gone now?

Hopefully a simple enough question for this thread.


I've encountered some flying enemies on Gleba.

I have lasers in my power armour. They target the big, ground-based creatures, and the little starfish, but always ignore the flying bee-like creatures.

Even when everything else is dead or I've ...

If you download Space Age from the Factorio website, it includes the whole game. It's not just the extension, it's the full game, so you don't need to first update the base game.


So it does, how convenient! I thought Space Age only included the expansion content, and I'd have to update Factorio ...