Yep, day 1 patch here... So, we’ve just released a small update to fix an issue with the achievements system not working correctly. Thanks to your feedback, the problem should has been resolved, and achievements should now unlock as intended.
Achievement Fix
Source: Steam Community (opens in a new tab)
Build and release context
Recorded Steam release date:
Within one calendar day of this post (UTC). The listed date does not establish an exact launch time.