JudasIscariot: Did you download the new installer for the base game?
Please make sure that you have the following file:
Mac:
infested_planet_2.1.0.15.dmg
Windows:
setup_infested_planet_2.1.0.2.exe
You can grab these from your account :)
mpeele: I had the 2.1.0.15.dmg file the first time I posted. And, it was never online.
I just updated to the newest, and still offline.
I do not yet have the add on DLC.
What is the actual site that this connects to?
I am not sure. Maybe this is a Steamworks feature that has been turned off for the GOG version.