Biter Bases Leave behind Biomass deposits when they perish, wich you can mine Use it to power the factory, research new weapons and develop more powerfull modules
Mods introducing new content into the game.
New ways to deal with enemies, be it attack or defense.
New Ores and resources as well as machines.
Things related to oil and other fluids.
Furnaces, assembling machines, production chains.
Changes to power production and distribution.