A few years ago, "boob physics"—how breasts "jiggled" in video games—was actually a topic of conversation.
This was probably because Dead or Alive creator Tomonobu Itagaki was actively promoting games (this, for example) during this period—games that featured boob physics.
Boob physics are not a thing of the past—heck, there's this example from last summer. And more recently, there's this new footage from Asura's Wrath, a game based on Buddhist mythology and featuring planet splitting battles.
If you don't like boobs (not everyone does), the footage also features man butt. Or rather, male god butt.
Hot Springs [GameTrailers]