What is "necrovision"

is a World War I "alternate" history horror first-person shooter developed by Polish developer The Farm 51 and published by 505 Games. It was released for the Microsoft Windows platform on 20 February 2009. The game was also published by Aspyr Media in the United States, on May 25, 2009, and Canada on August 10, 2009. A prequel entitled NecroVisioN: Lost Company was released in February 2010.