Beast of Winter is the first expansion for Pillars of Eternity 2 Deadfire. The plot focuses on mysterious cultists who await the end of the world. During this expansion your party will visit an island covered in ice. Other features include new companions and unique pieces of equipment. Also, the expansion will take you to a whole new dimension. Beast of Winter isn't a standalone expansion - it requires the original game.
How to start the expansion?
To start this expansion, you have to load your save done before you reached the end of the main storyline of Pillars of Eternity 2 Deadfire. You should automatically receive a letter. If that doesn't happen then you have to enter the nearest location and then go back on your ship. This letter starts An Honored Guest quest. Your goal is to go to the first location added by the expansion - Harbinger's Watch (located in the bottom right corner of the world map). The location is already revealed to you.