There was an issue with not getting achievements in any other room other than the first room. We just pushed out an update that fixes this problem!
Go forth achievement hunters!
Source: Steam Community (opens in a new tab)
Build and release context
Steam update times within 24 hours of this post. Matching dates do not confirm which build it describes.
Build 2605264 · development branch
Steam updated · First observed
Recorded Steam release date:
Within one calendar day of this post (UTC). The listed date does not establish an exact launch time.