I was planning this update for a while with some major updates around game modes (two new game modes but they still need a little more time to cook, in the meantime I've updated and fixed some major bugs that have been around since launch) some more game mode updates will be coming in the not too distant future.
Boss achievement bug fix
Build and release context
Steam update times within 24 hours of this post. Matching dates do not confirm which build it describes.
Build 23207429 · public branch
Steam updated · First observed