Add a force of machines. The AI advanced until becoming independent of the human race.
Mods introducing new content into the game.
Changes to enemies or entirely new enemies to deal with.
Happens in Factorio 0.18.
Failed to load mods: Missing sound when loading sound library: base/sound/flying-robot-1-1.ogg
The solution is to edit the archive inside the .zip mod sound.lua (it's inside "prototypes"), the base game only have 5 sound archives
It worked for my.
