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.