In No Country For Old Men, they mention this killing in a throwaway line (it involves contract killing and stars Woody Harrelson)

I’ve been through a rage quit and a ‘got bored of not progressing’ quit, but I’ve kept coming back to the game. I’ve finished the game on the normal difficulty, still on and off making my way to finishing it on the hardest.

Slowly grinding my way through Sifu on Master difficulty.