Paranautical Activity

Paranautical Activity is a first-person shooter video game developed by American indie studio Code Avarice, and later by Digerati. It was released for Microsoft Windows in a beta form in February 2013, and after completing the Early Access program on Steam, was fully released on October 20, 2014. The game struggled with Valve's Steam service. Valve initially refused to allow it on its Greenlight system while the developer was in talks with another publisher, and later pulled it from Steam after its lead developer, Mike Maulbeck, threatened Valve's CEO, Gabe Newell, on social media.