??

Added illustrations from the page of the original mod "The Ruins Mod" https://mods.factorio.com/mod/AbandonedRuins.

ok nice, and what are the use of "base" sub mods ?

The Ruins Mod is not just a regular ruins mod. It is a tool for creating completely new game events!

For example, there are already mods like these:

https://mods.factorio.com/mod/FortressRuins
https://mods.factorio.com/mod/RedDwarf-AbandonedRuins

These mods do not just add content that is already in the base game, but they themselves contain new content and offer new game solutions.... For example, ruins of a completely alien civilization, with new entities, materials, technologies, challenges and recipes...

And in this case, ruins that simply add basic content to the game may be redundant....

ok so it's just a sources for modders ? th

No. This particular mod is playable.

It just adds ruins based on vanilla game content