The team Campo Santo published the news of the acquisition by Valve in a post on the blog during the weekend explaining that they found a company with which they share a good part of their values.

Campo Santo will move to the Bellevue headquarters in Valve as part of the agreement, but do not expect any other radical changes. All 12 members of the study will remain in their current roles, while work on the next project, In the Valley of the Gods, will continue as expected.

In addition, the study promised to continue supporting Firewatch:

We had a series of long conversations with Valve's people and all of them shared the satisfaction we feel in working with people whose talents belittle ours to do things we would never have thought possible.