Two Worlds II: Call of the Tenebrae is the second big extension to Two Worlds II, a third-person action RPG game by the Polish studio Reality Pump. The Call of the Tenebrae expansion appeared six years after the premiere of the original and accompanied the release of the refreshed version of Two Worlds II, so it could offer improved graphics. Adventure focuses on a completely new enemy - the sinister race of rat-like humanoids that serve even more formidable creatures seeking to destroy the world of Antaloor. The player's task is to gather allies, both among old acquaintances and new characters, and contain the danger. The Call of the Tenebrae story campaign provides several hours of fun. It takes place in new, diverse locations, where items and skills are previously unavailable, and more enemies to defeat. Apart from the extensive single-player content, the extension does not introduce any news to the multiplayer mode.

"In the wake of a rash of disappearances across the land, the Hero receives an unexpected letter from DarPha, compelling him to travel across Antaloor to assist her in solving the mysterious kidnappings. He arrives just in time to see a group of robed figures seemingly murder DarPha before disappearing into a magical portal. The Hero is thrust into a decades old mystery while a new race of horrific, rat-like creatures attempt to destroy Antaloor for good. "