This mod adds a nest of Cold Aliens and Worms! These aliens will cause cold damage, and may launch a cold cloud over your factory.
Ohhh, and I must warn you, that someone said there is a Cold Alien Mother somewhere...
Optional Additional Features:
-Defeated aliens drops cold artifacts
-Reaseache that unlocks usefull cold items
-Weapons with cold damage
-Armors with cold resistances
-alien-biomes (https://mods.factorio.com/mod/alien-biomes): if this mod is installed, cold aliens will appear in cold surfaces and not in hot ones.
-Explosive_biters (https://mods.factorio.com/mod/Explosive_biters): the hot counter part of enemies to populate alien biomes.