Paying for mods is nothing new. Hell, I grew up with a great paid mod of Wolfenstien in the form of Blake Stone: Aliens of Gold. Thing is, that was officially published by Apogee, after going through much quality control and testing.
Steam needs to run it like that. And not like Early Access/Greenlight where untested crap gets pushed without a second thought.
Steam needs to run it like that. And not like Early Access/Greenlight where untested crap gets pushed without a second thought.