Arma 3 Headless Client Steam Authentication Failed Hot Instant

In your mission folder, create or edit description.ext :

class Header gameType = "Coop"; playerCount = 1; ; class Params class headlessClients title = "Headless Client"; values[] = 0,1; default = 1; ; ; arma 3 headless client steam authentication failed hot

If you are hosting for a large community, consider migrating to – it handles headless auth more gracefully than Windows. In your mission folder, create or edit description