building gets xp from working and level up
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.
Furnaces, assembling machines, production chains.
Flamethrower turret and laser turret do not gain experience
not everything works yet, i'm implementing as my game reaches the technology
but the tower in the "Missile Defense Systems" mod gets xp :) only info or feedback
good to know