Campo Santo, the independent studio behind Firewatch, is working on a new game called In the Valley of Gods. It's a first-person adventure set in the 1920s that takes players through the abandoned, ancient deserts of Egypt. Here's how Campo Santo describes it:
"You play as an explorer and filmmaker who, along with your old partner, has traveled to the middle of the desert in the hopes of making a seemingly-impossible discovery and an incredible film."
Source: In the Valley of Gods