Chris wrote:Yes we've had several different messages in the last day or two complaining of authentication errors with the steam version. I'll look into it - this definitely needs solving.

ty , whatever you have done appears to have resolved the issue for me.

Any more updates about this ? I bought defcon as part of the introvision game pack on steam a while back and at the time it all worked fine. I have since emigrated and had to get a new computer and all of the games from the pack work apart from defcon which refuses to authenticate through steam. I h...