Fun fact: Half-Life Assasins had the first ever character model to have animated breast bones for bouncing in a video game.
I don't think that's correct, but I don't know enough about the history of tiddy physics in games. Pretty sure SNK was on the ground floor with Fatal Fury 2.
https://youtu.be/sbb9YYkag94
That's a cool video, but my point still stands. Fatal Fury 2 was released in 1992. And Dead or Alive was also released before half life.