Bill Gates once starred in a bizarre Doom promo to push Windows 95 back in 1993 — tech mogul wore a trench coat, wielded a shotgun, and shot a demon, saying 'Who do you want to execute today?'
…the background collaboration between Microsoft and a host of game developers was the work of Gabe Newell. The future Valve co-founder initiated and led the Microsoft team responsible for porting id…