Studio Wildcard has reveled its next expansion "Ark: Aberration" for the long-running, dino-riding open-world survival game ARK: Survival Evolved is slated for release mid-December. And brings with it a number of massive changes, most notably a new underground biome to explore.

Releasing on December 12 across PC, Xbox One and PlayStation 4, Aberration is just one part of an end-of-year explosion of love for ARK with the game also joining in with Black Friday sales across a number of different online retailers, and on specific platforms.

Survivors will wake up on Aberration - a derelict, malfunctioning ARK featuring with an elaborate underground biome system with new challenges unlike those found on prior ARK maps. Extreme radioactive sunlight and environmental hazards, ziplines, wingsuits, climbing gear, creatures like the Rock Drake and Lantern Pug, and more await in these vast caves.

“Aberration” will be available as a standalone expansion pack (USD$19.99) and as part of the ARK: Explorer’s Edition (Season Pass). “Aberration” will be the second Expansion Pack for ARK: Survival Evolved, joining the desert-themed Scorched Earth map in continuing to shed light onto the vast mysteries of ARK! It will release worldwide December 12th for PlayStation 4, Xbox One and Steam.

Watch the trailer for Aberration embedded below.