Edit: confirmed by Campo Santo blog
http://blog.camposanto.com/post/173170027579/campo-santo-news
Original thread:
https://kotaku.com/sources-valve-buys-firewatch-developer-campo-santo-1825445890
Mod edit:
http://blog.camposanto.com/post/173170027579/campo-santo-news
The twelve of us at Campo Santo have agreed to join Valve, where we will maintain our jobs as video game developers and continue production on our current project, In the Valley of Gods.
Original thread:
https://kotaku.com/sources-valve-buys-firewatch-developer-campo-santo-1825445890
Independent studio Campo Santo (Firewatch) has been acquired by a most unlikely of suitors—Valve, a digital store operator that once made video games. Three people familiar with the news confirmed the purchase to Kotaku today.
Mod edit:
Campo Santo blog said:Yes, we're still making In the Valley of Gods (as a Valve game!); yes, we'll still support Firewatch; and yes, we'll still produce The Quarterly Review and our regular blog content. Thanks so much for your interest in our games and we'll see you in Washington. Cheers.