[2] After talking about the idea with Rodkin, the two left the company and co-founded Campo Santo on September 18, 2013, joined by Mark of the Ninja designer Nels Anderson and graphic artist Olly Moss.

[3][4] Environment artist Jane Ng and designer and composer Chris Remo, who had also worked with Vanaman and Rodkin on the Idle Thumbs podcast, soon joined the team as well.

[10] In August 2014, a game demo of Firewatch was released at PAX West, revealing the overall plotline and story of a fire lookout named Henry in the Shoshone National Forest in 1989.

[22] In September 2017, Sean Vanaman tweeted that he would be issuing a Digital Millennium Copyright Act (DMCA) takedown against the streamer PewDiePie's playthrough of Firewatch in response to him using a racist insult while streaming PlayerUnknown's Battlegrounds.

[24] Ars Technica noted that the company previously stated on their website that they gave open permission to stream and monetize videos made while playing the game.

[27][28] Development on In The Valley of Gods was put on hold in July 2019, partially due to head writer Sean Vanaman moving to the writing team for Half-Life: Alyx, which had not been announced to the public at the time.