Quote bond (

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how can i reproduce that? all servers with Zombie Horde 2 are shown ok, and there are no servers with <BAD PACKET DATA>
Seems like it happen when server is active (players in game), perhaphs it triggers a team mode once people join.
UPD Kaminsky's quote:
How Doom Explorer treats game modes (e.g. cooperative isn't a team-based game mode) is likely the same as how Doomseeker does, as explained here: https://zandronum.com/tracker/view.php?id=4571#c24623