Tim Cain, one of the creators of the original Fallout video game, has rejoined Xbox studio Obsidian Entertainment to work on a mystery project. In a video published on his YouTube channel (which he's used to tell a lot of fun stories about the making of the first Fallout game), Cain said he was now a full-time member of staff at Obsidian, last seen releasing The Outer Worlds 2, Grounded 2, and Avowed.