The First Descendant developer and publisher Nexon has delivered permanent bans to thousands of players in what the company calls its first-ever "crackdown on abusive users."
As part of the crackdown, in its online notice, Nexon announced that more than 1,300 players have been perma-banned for creating, distributing, and using "unauthorized programs." In other live services, those programs would normally include aim bots that give players a competitive upper hand, but The First Descendant is a purely PvE shooter, so your guess at what "programs" might be at play is as good as mine.
