The achievements for playing Dual matches (‘
Dueler’, ‘
Duelist’ and ‘
Master Duelie’) are broken for some people in the current version of the game.
In order to unlock them, you’ll be required to ‘
downpatch’ your version of ORION: Prelude to an earlier version where the achievements still worked.
Link to my Steam guide I wrote: https://steamcommunity.com/sharedfiles/filedetails/?id=22217...