At night, bugs can hatch out of any natural surface. Defend against attacks from all sides, and even inside if you're not careful. Highly configurable. Inspired by BREAM, by StephenB.
Tweaks
Mod category: Tweaks
Small changes concerning balance, gameplay, or graphics.
Are the ERM races even being spawned with this mod?
Either way, this mod does try to be as lightweight as possible, but at the end of the day it's still spawning massive waves of enemies that the game engine needs to handle. You could try tweaking your settings to spawn less units but prefer stronger unit types.