Heroes 5 mini

By the way, guys. I understand that no one plays it anymore, but maybe someone remembers when you could add different achievements to your profile, like winning 10-100 battles, winning without losses, etc.
I saw this message on an opponent's profile: "Has recruited another player." I understand what it means, but how do you earn it, and what is it exactly?
Maybe someone can tell me... someone who used to play...