What cat does Barney refer to during your first meeting with Kleiner in Half life 2?

The cat did not appear in any of these games:

  • Half Life (Source)
  • Blue Shift
  • Opposing Force
  • Decay
  • Either of the Portals
  • Half Life 2 or anything released thereafter.

I'm going to call this a noodle incident (TV Tropes link, you have been warned).


You all have missed the answer completely. It is simply a reference to a scene in the movie "the fly". The lab is even designed to be similar to the movie.