↑ World disappearing on gfx change - Steam Users' Forums (retrieved).↑ Twitter - last accessed on ' Sleeping Dogs: forces the highest refresh rate available (144 in this case), though switching desktops via swipe (not alt+tab) and changing into 60 forces it into a confused state about present intervals:'.↑ Sleeping Dogs Collection :: Sleeping Dogs™ General Discussions - last accessed on 9 June 2023.↑ Sleeping Dogs: Definitive Edition confirmed! - last accessed on.Where is the serial key when purchased through Steam.