The Irradiated Strain. In reality, this can barely be considered a strain, instead more like a.. Consequence. Irradateds only come as a result of a nuke being deployed on a hive, or through a xenomorph of any strain being splashed with a potion of Irradiation.

Irradiated are completely sterile, and are incapable of evolving. Irradiated ovomorphs instead of hatching a facehugger instead.. explode. In clusters, this will cause a dangerous chain reaction capable of severely damaging even a Queen.

Irradiated are incapable of founding new hives, but hives that already existed will keep their hive.. Just not the claims.

Irradiateds blood are freezing. Instead of melting blocks fully, they produce blocks of blue ice whilst still burning away at targets within the acid, resulting in a cold burn and applying slowness.

For Example,

An Irradiated Praetorian.

Irradiateds are a dangerous “strain” that exist solely as a consequence for the players action. Whilst not guaranteed from nuking a hive they instead act as the result of what you have done. They never truly die.