Kotaku reveals in an interview with Gabe Newell, co-founder of Valve, that Tim Cook did not actually visit the company after all:
No one here was meeting with Tim Cook or with anybody at Apple that day. I wish we were! We have a long list of things we’d love to see Apple do to support games and gaming better. But no, we didn’t meet with Tim Cook. He seems like a smart guy, but I’ve never actually met him.