Irradiated worlds have a rocky surface with spirals, vents of steaming radioactive gasses and highly mutated, warped plants. Viewed from space, they have lots of spiraling circles. The resources Uranium, Gamma Root and Radon can be found here.

Despite the radioactive nature of these planets, fauna are surprisingly common.

Note that Hazard protection is always on due to high amounts of radiation. Radiation Protection upgrades are recommended, especially on extreme worlds.

Water can be found on some irradiated biomes.

Biome Subtype - Infested
The Infested subtype can overlay the normal planetary biome types, creating twisted, infected flora not seen on other planets of the same variants.

They come in six different planetary pallets with each seemingly having its own main flora type for each planetary variant. Whispering Eggs dot the landscape and Biological Horrors appear with them when broken, similar to Dead worlds.

Infested planets also display chromatic aberration filters as well as glitch music, similar to Mega Exotic and Exotic worlds.