- "I knew this place was too good to be true."
- ―Nathan Johnson.
The Evo Corporation is a research facility operating nearby City 17, and is secretly under operations by the Clandestine Company. Nathan Johnson found employment here after deciding to leave City 17, but as per usual found the place wasn't as straight forward as he hoped.
The Evo Corporation was originally an unnamed research division for the Combine during their occupation of earth.
Following their downfall the Clandestine Company took control and began to acquire technology from the Combine through secret vaults underneath their facility. Transforming it into the "Evo Corporation" they began to commit secret experiments, and expanded their company across many other former Combine owned cities. During this period they plotted their own invasion, which would start with an attack on earth an then followed by a galactic then universal domination.