Dota 2 is of note, but that was a pretty safe project being a straight remake of an already popular mod with the mods developer at the helm. Their major titles since 2012 were:

  CS:GO (remake of a remake)
  Dota 2 (remake)
  Artifact (flopped)
  Underlords (flopped)
  Alyx (good)
  Counter-Strike 2 (remake of a remake of a remake)
  Deadlock (early beta, but promising)

They haven't completely lost the sauce, but it's rare to see the old Valve show up these days.