Cold Darkness Awakened, the next expansion for Rise of the Tomb Raider, comes out on March 29, Microsoft and Crystal Dynamics announced today. It will be available on that date for Xbox One, Xbox 360, and PC. A new trailer has also been released.

Check it out:

Cold Darkness Awakened takes players to a decommissioned Cold War research base. It’s been overrun, however, and a “deadly affliction” pours out from it.

“As the illness seeps into the wilderness surrounding the base, Trinity soldiers transform into bloodthirsty killers who thrive on carnage,” reads a line from the expansion’s description. “To prevent the affliction from spreading, Lara must rely on her wits, physical agility, and crafting abilities to overcome this new enemy and shut down the decommissioned base.”

Cold Darkness Awakened is Rise of the Tomb Raider’s third add-on, following Endurance Mode (December 2015) and Baba Yaga: The Temple of the Witch (January 2016). It’s included with the Rise of the Tomb Raider Season Pass, which sells for $30. Microsoft did not say how much Cold Darkness Awakened will go for on its own, but we have followed up with Microsoft in an attempt to get more details.

In other news about Rise of the Tomb Raider, the game is marked down this week as part of Microsoft’s new Spring Sale. Additionally, the game is coming to PlayStation 4 later this year, though a release date has not been announced.