Image credit: Rockstar Games

Red Dead Redemption 2's infamous animated horse testicles , which are realistic enough to contract in cold weather and expand again in the warmth, were apparently not a feature mandated by Rockstar. As iconic as they've become - a symbol of extraordinary detail in the game - they didn't originate from a list of features that needed to be added to the game. The horse testicles were instead the unexpected work of one person, or a group of people, autonomously working on the Cowboy epic.

Journalist Jason Schreier heard this anecdote from Rockstar head of development Aaron Garbut while visiting Rockstar North to write an expansive report for Bloomberg about the making of GTA 6 . "Garbut actually brought this up," Schreier said in a video on YouTube .…