Ark: Aberration is the second expansion pack for Ark: Survival Evolved. The titular Aberration is a derelict, malfunctioning Ark with new underground biome systems. Its focus is on radiation, including damaging radioactive sunlight, leading to genetic mutations for existing species as well as the creation of all new creatures. Each packs an array of new skills should you be able to tame them, such as the Rock Drake which can clamber up vertical surfaces and the Cave Crustacean which can pick up and hurl creatures and people on demand.